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//pointer memory use instead of structure stack memory

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#define MAX_ADDRESS_CNT 200

struct st_basic_trade

{

char dataclass[2];

char infoclass[2];

char marketclass[1];

char stockcode[12];

char serialno[8];

char abbrstockcode[9];

char abbrstocknamekor[40];

char abbrstocknameeng[40];

char senddate[8];

char infodivisiongroupno[5];

char stockgroupid[2];

char isunittrade[1];

char exclasscode[2];

char facevaluechangeclasscode[2];

char isopenpricebasedstandardprice[1];

char isrevaluationstockreason[2];

char isstandardpricechangestock[1];

char israndomendpossibillty[1];

char ismarketalarmdangernotice[1];

char marketalarmclasscode[2];

char iscorporategovernancefine[1];

char ismanagementstock[1];

char isinsinceritypublicnewsappoint[1];

char isbackdoorlisting[1];

char istradestop[1];

char indexbusinesstypelarge[3];

char indexbusinesstypemedium[3];

char indexbusinesstypesmall[3];

char standardindustrycode[10];

char businesstypekospi200[1];

char listpricesizecode[1];

char ismanufactureindustry[1];

char iskrx100stock[1];

char isdividendindexstock[1];

char iscorporategovernanceindexstock[1];

char investorganclasscode[2];

char iskospi[1];

char iskospi100[1];

char iskospi50[1];

char iskrxsectorindexcar[1];

char iskrxsectorindexsemiconductor[1];

char iskrxsectorindexbio[1];

char iskrxsectorindexfinance[1];

char iskrxsectorindexit[1];

char iskrxsectorindexenergychemical[1];

char iskrxsectorindexsteel[1];

char iskrxsectorindexnecessary[1];

char iskrxsectorindexmediacomm[1];

char iskrxsectorindexconstruction[1];

char iskrxsectorindexfinanceservice[1];

char iskrxsectorindexstock[1];

char iskrxsectorindexship[1];

char standardprice[9];

char ydayclosepriceclasscode[1];

char ydaycloseprice[9];

char ydayaccmvolume[12];

char ydayaccmamount[18];

char uplimitprice[9];

char downlimitprice[9];

char substituteprice[9];

char facevalue[12];

};

int main(int argc, char *argv[])

{

struct st_basic_trade st_basic_trade[MAX_ADDRESS_CNT];

struct st_basic_trade *address_byte_trade1;

struct st_basic_trade *address_byte_trade2;

struct st_basic_trade *address_byte_trade_tmp;

char *address_byte[MAX_ADDRESS_CNT];//st_basic_trade structure address saving pointer array

char *address_byte_tmp;//st_basic_trade structure address saving pointer

FILE *fp=NULL;//file pointer

char rbuf[4096];//file read buffer

char tmp1[200];

char tmp2[200];

int ii,kk,continue_tmp;

int st_basic_trade_cnt;

if((fp=fopen("BATCH_A0011.dat", "rt"))==NULL)

{

return(-1);

}

//DATA MEMORY INIT

for(kk=0; kk<MAX_ADDRESS_CNT; kk++)

{

memset(&st_basic_trade[kk],0x00,sizeof(st_basic_trade[kk]));

}

//DATA LOAD FROM FILE

kk=0;

while(1)

{

memset(rbuf,0x00,sizeof(rbuf));

if(fgets(rbuf,sizeof(rbuf),fp)==NULL) break;

memcpy(&st_basic_trade[kk], rbuf, (int)sizeof(st_basic_trade[kk]));

continue_tmp=-1;

if(memcmp(st_basic_trade[kk].stockgroupid,"ST",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"EF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"RT",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"MF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"SC",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"IF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"DR",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"FS",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"EN",2)==0) continue_tmp=100;

if(continue_tmp<0) continue;

kk++;

if(kk==MAX_ADDRESS_CNT) break;

}

st_basic_trade_cnt=kk;

if(fp != NULL) fclose(fp);

//POINTER MEMORY USE INSTEAD OF STRUCTURE STACK MEMORY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

address_byte[kk] = (char *)&st_basic_trade[kk];

}

//DESCENDING BY POINTER MEMORY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

for(ii=kk+1; ii<st_basic_trade_cnt; ii++)

{

address_byte_trade1 = (struct st_basic_trade *)address_byte[kk];

address_byte_trade2 = (struct st_basic_trade *)address_byte[ii];

memset(tmp1,0x00,sizeof(tmp1));

memset(tmp2,0x00,sizeof(tmp2));

sprintf(tmp1, "%.*s", (int)sizeof(address_byte_trade1->standardprice), address_byte_trade1->standardprice);

sprintf(tmp2, "%.*s", (int)sizeof(address_byte_trade2->standardprice), address_byte_trade2->standardprice);

if(atoi(tmp1) > atoi(tmp2))

{

address_byte_tmp=address_byte[kk];

address_byte[kk]=address_byte[ii];

address_byte[ii]=address_byte_tmp;

}

//RESULT DISPLAY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

address_byte_trade_tmp = (struct st_basic_trade *)address_byte[kk];

printf(

"[%.4d]:"

"(%.*s)"

"\n",

kk+1,

(int)sizeof(address_byte_trade_tmp->iskospi),address_byte_trade_tmp->iskospi,

(int)sizeof(address_byte_trade_tmp->dataclass),address_byte_trade_tmp->dataclass,

(int)sizeof(address_byte_trade_tmp->infoclass),address_byte_trade_tmp->infoclass,

(int)sizeof(address_byte_trade_tmp->serialno),address_byte_trade_tmp->serialno,

(int)sizeof(address_byte_trade_tmp->stockgroupid),address_byte_trade_tmp->stockgroupid,

(int)sizeof(address_byte_trade_tmp->abbrstockcode),address_byte_trade_tmp->abbrstockcode,

(int)sizeof(address_byte_trade_tmp->standardprice),address_byte_trade_tmp->standardprice,

(int)sizeof(address_byte_trade_tmp->ydayaccmvolume),address_byte_trade_tmp->ydayaccmvolume,

(int)sizeof(address_byte_trade_tmp->ydayaccmamount),address_byte_trade_tmp->ydayaccmamount,

(int)sizeof(address_byte_trade_tmp->uplimitprice),address_byte_trade_tmp->uplimitprice,

(int)sizeof(address_byte_trade_tmp->downlimitprice),address_byte_trade_tmp->downlimitprice,

(int)sizeof(address_byte_trade_tmp->abbrstocknameeng),address_byte_trade_tmp->abbrstocknameeng);

}

return(0);

}

/*RESULT

[0140]:(Y)(A0)(01)(00000068)(ST)(A000860 )(000035500)(000000012109)(000000000427932950)(000046150)(000024850)(KANGNAM JEVISCO )

[0141]:(Y)(A0)(01)(00000069)(ST)(A000880 )(000035550)(000000250112)(000000008841239150)(000046200)(000024900)(Hanwha )

[0142]:(Y)(A0)(01)(00000161)(ST)(A002390 )(000035800)(000000175128)(000000006200375550)(000046500)(000025100)(HANDOK )

[0143]:(Y)(A0)(01)(00000062)(ST)(A000720 )(000036000)(000000935395)(000000033665525250)(000046800)(000025200)(HyundaiEng&Const )

[0144]:(Y)(A0)(01)(00000168)(ST)(A002620 )(000037150)(000000043866)(000000001645729300)(000048250)(000026050)(JeilPharm )

[0145]:(Y)(A0)(01)(00000031)(ST)(A000180 )(000038150)(000000051172)(000000001962002000)(000049550)(000026750)(SCEHoldings )

[0146]:(Y)(A0)(01)(00000080)(ST)(A001060 )(000040300)(000000157559)(000000006374627600)(000052300)(000028250)(JWPHARMA )

[0147]:(Y)(A0)(01)(00000082)(ST)(A001067 )(000042550)(000000000536)(000000000022519300)(000055300)(000029800)(JWPHARMA(2PB) )

[0148]:(Y)(A0)(01)(00000063)(ST)(A000725 )(000043150)(000000000564)(000000000024648550)(000056000)(000030250)(HyundaiEng&Con(1P) )

[0149]:(Y)(A0)(01)(00000039)(ST)(A000270 )(000043550)(000001342543)(000000058170323500)(000056600)(000030500)(KiaMtr )

[0150]:(Y)(A0)(01)(00000147)(ST)(A002170 )(000044500)(000000010952)(000000000488631300)(000057800)(000031150)(SamyangTongsang )

[0151]:(Y)(A0)(01)(00000163)(ST)(A002420 )(000045400)(000000001276)(000000000057439100)(000059000)(000031800)(Century )

[0152]:(Y)(A0)(01)(00000126)(ST)(A001745 )(000045750)(000000001253)(000000000058412550)(000059400)(000032050)(SKNetworks(1P) )

[0153]:(Y)(A0)(01)(00000124)(ST)(A001725 )(000046950)(000000000551)(000000000025664750)(000061000)(000032900)(ShinyoungSecu(1P) )

[0154]:(Y)(A0)(01)(00000123)(ST)(A001720 )(000049550)(000000002054)(000000000101791900)(000064400)(000034700)(ShinyoungSecu )

[0155]:(Y)(A0)(01)(00000030)(ST)(A000157 )(000050500)(000000000118)(000000000005902400)(000065600)(000035400)(DOOSAN(2PB) )

[0156]:(Y)(A0)(01)(00000067)(ST)(A000850 )(000050800)(000000001558)(000000000079929400)(000066000)(000035600)(HMT )

[0157]:(Y)(A0)(01)(00000029)(ST)(A000155 )(000051000)(000000001053)(000000000053774400)(000066300)(000035700)(DOOSAN(1P) )

[0158]:(Y)(A0)(01)(00000192)(ST)(A003030 )(000051800)(000000009657)(000000000494291400)(000067300)(000036300)(SeAhStl )

[0159]:(Y)(A0)(01)(00000073)(ST)(A000950 )(000053000)(000000001352)(000000000072137200)(000068900)(000037100)(Chonbang )

[0160]:(Y)(A0)(01)(00000156)(ST)(A002320 )(000053200)(000000053672)(000000002833688300)(000069100)(000037300)(HanjinTrnspt )

[0161]:(Y)(A0)(01)(00000196)(ST)(A003080 )(000055200)(000000000851)(000000000046476300)(000071700)(000038700)(SungboChem )

[0162]:(Y)(A0)(01)(00000083)(ST)(A001070 )(000056400)(000000001586)(000000000088415000)(000073300)(000039500)(TaihanTextl )

[0163]:(Y)(A0)(01)(00000137)(ST)(A001940 )(000058300)(000000002805)(000000000163564100)(000075700)(000040900)(KISCO Holdings )

[0164]:(Y)(A0)(01)(00000114)(ST)(A001530 )(000059200)(000000001443)(000000000085351600)(000076900)(000041500)(Dongil )

[0165]:(Y)(A0)(01)(00000197)(ST)(A003090 )(000063200)(000000007172)(000000000457728500)(000082100)(000044300)(Daewoong )

[0166]:(Y)(A0)(01)(00000057)(ST)(A000650 )(000063600)(000000000824)(000000000053056100)(000082600)(000044600)(ChunilExp )

[0167]:(Y)(A0)(01)(00000140)(ST)(A002020 )(000070600)(000000044170)(000000003133398600)(000091700)(000049500)(KOLON CORP )

[0168]:(Y)(A0)(01)(00000028)(ST)(A000150 )(000072400)(000000117697)(000000008567840400)(000094100)(000050700)(DOOSAN )

[0169]:(Y)(A0)(01)(00000055)(ST)(A000590 )(000072600)(000000001684)(000000000122223400)(000094300)(000050900)(CSHOLDINGS )

[0170]:(Y)(A0)(01)(00000032)(ST)(A000210 )(000077600)(000000148934)(000000011570941400)(000100500)(000054400)(DaelimInd )

[0171]:(Y)(A0)(01)(00000020)(ST)(A000075 )(000077800)(000000000177)(000000000013515400)(000101000)(000054500)(SAMYANGHOLDINGS(1P) )

[0172]:(Y)(A0)(01)(00000048)(ST)(A000480 )(000080600)(000000000412)(000000000033291100)(000104500)(000056500)(ChosunRefrctr )

[0173]:(Y)(A0)(01)(00000179)(ST)(A002795 )(000087500)(000000052984)(000000004654231400)(000113500)(000061300)(AmoreG(1P) )

[0174]:(Y)(A0)(01)(00000205)(ST)(A003300 )(000094800)(000000020468)(000000001954590400)(000123000)(000066400)(HanilCement )

[0175]:(Y)(A0)(01)(00000142)(ST)(A002030 )(000098300)(000000000761)(000000000074790600)(000127500)(000068900)(ASIA HOLDINGS )

[0176]:(Y)(A0)(01)(00000198)(ST)(A003120 )(000107500)(000000000483)(000000000051978500)(000139500)(000075500)(IlsungPharm )

[0177]:(Y)(A0)(01)(00000119)(ST)(A001630 )(000120000)(000000020708)(000000002442273500)(000156000)(000084000)(CHONGKUNDANG HOLDINGS )

[0178]:(Y)(A0)(01)(00000079)(ST)(A001045 )(000135000)(000000002881)(000000000387653500)(000175500)(000094500)(CJ(1P) )

[0179]:(Y)(A0)(01)(00000200)(ST)(A003200 )(000148000)(000000001833)(000000000268996500)(000192000)(000104000)(IlshinSpng )

[0180]:(Y)(A0)(01)(00000178)(ST)(A002790 )(000161000)(000000715462)(000000113395522000)(000209000)(000113000)(AmoreG )

[0181]:(Y)(A0)(01)(00000167)(ST)(A002600 )(000161000)(000000000169)(000000000027542500)(000209000)(000113000)(CHOHEUNG )

[0182]:(Y)(A0)(01)(00000019)(ST)(A000070 )(000177000)(000000028579)(000000005043584000)(000230000)(000124000)(SAMYANGHOLDINGS )

[0183]:(Y)(A0)(01)(00000182)(ST)(A002840 )(000179000)(000000000063)(000000000011328500)(000232500)(000125500)(MiwonComcl )

[0184]:(Y)(A0)(01)(00000086)(ST)(A001130 )(000184000)(000000000647)(000000000119095000)(000239000)(000129000)(DaehanFlrMill )

[0185]:(Y)(A0)(01)(00000024)(ST)(A000105 )(000190000)(000000000029)(000000000005484500)(000247000)(000133000)(Yuhan(1P) )

[0186]:(Y)(A0)(01)(00000066)(ST)(A000815 )(000195000)(000000003175)(000000000613795000)(000253500)(000136500)(SamsungF&MIns(1P) )

[0187]:(Y)(A0)(01)(00000105)(ST)(A001465 )(000198500)(000000000076)(000000000015081500)(000258000)(000139000)(BYC(1P) )

[0188]:(Y)(A0)(01)(00000017)(ST)(A000050 )(000203000)(000000001581)(000000000318739000)(000263500)(000142500)(Kyungbang )

[0189]:(Y)(A0)(01)(00000056)(ST)(A000640 )(000214000)(000000013643)(000000002898145500)(000278000)(000150000)(Donga Socio Holdings )

[0190]:(Y)(A0)(01)(00000025)(ST)(A000120 )(000216000)(000000029404)(000000006392050500)(000280500)(000151500)(CJ korea express )

[0191]:(Y)(A0)(01)(00000078)(ST)(A001040 )(000281500)(000000039434)(000000011175365500)(000365500)(000197500)(CJ )

[0192]:(Y)(A0)(01)(00000065)(ST)(A000810 )(000303500)(000000038064)(000000011500917820)(000394500)(000212500)(SamsungF&MIns )

[0193]:(Y)(A0)(01)(00000023)(ST)(A000100 )(000330000)(000000030710)(000000010129506500)(000429000)(000231000)(Yuhan )

[0194]:(Y)(A0)(01)(00000160)(ST)(A002380 )(000432000)(000000014528)(000000006278496500)(000561000)(000302500)(KCC )

[0195]:(Y)(A0)(01)(00000187)(ST)(A002960 )(000485000)(000000000772)(000000000378426000)(000630000)(000339500)(HankookShellOil )

[0196]:(Y)(A0)(01)(00000104)(ST)(A001460 )(000532000)(000000000326)(000000000172720000)(000691000)(000373000)(BYC )

[0197]:(Y)(A0)(01)(00000059)(ST)(A000670 )(000931000)(000000001930)(000000001790511000)(001210000)(000652000)(Youngpoong )

[0198]:(Y)(A0)(01)(00000153)(ST)(A002270 )(000943000)(000000003189)(000000002984664000)(001225000)(000661000)(LotteFood )

[0199]:(Y)(A0)(01)(00000203)(ST)(A003240 )(000986000)(000000000664)(000000000656189000)(001281000)(000691000)(TaekwangInd )

[0200]:(Y)(A0)(01)(00000134)(ST)(A001800 )(001028000)(000000010402)(000000010702212000)(001336000)(000720000)(ORION )

bash-3.1$

*/

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#include <stdio.h>

#include <string.h>

typedef struct ____HM

{

int hh;

int mm;

}HM;

//시간(HH:MM)10:00에서 unit(MINUTE)만큼 뺄때에 구해지는 HH:MM을 계산

void ____get_hour_min(HM *sihm, int unit)

{

int divide_hh, divide_mm, share;

divide_hh = (int)(unit / 60);

divide_mm = unit - (int)(unit / 60) * 60;

if(divide_mm > 0) share = 1;

else share = 0;

sihm->hh = 10 - divide_hh - share;

if(share==1) sihm->mm = 60 - divide_mm;

else sihm->mm = divide_mm;

}

int main(int argc, char *argv[])

{

HM sihm;

int kk;

//10:00에서 61분에서 300분까지를 빼서 나오는결과를 출력

for(kk=61; kk<300; kk++)

{

____get_hour_min( &sihm, kk);

printf("MINUTE(%.6d),sihm.hh(%d),sihm.mm(%d)=HH:MM(%02d:%02d)\n", kk, sihm.hh, sihm.mm, sihm.hh, sihm.mm);

}

return(0);

}

/*

bash-3.1$ gcc -c 61.c

bash-3.1$

bash-3.1$ gcc -o 61 61.o

bash-3.1$

bash-3.1$ 61

MINUTE(000061),sihm.hh(08),sihm.mm(59)=HH:MM(08:59)

MINUTE(000062),sihm.hh(08),sihm.mm(58)=HH:MM(08:58)

MINUTE(000063),sihm.hh(08),sihm.mm(57)=HH:MM(08:57)

MINUTE(000064),sihm.hh(08),sihm.mm(56)=HH:MM(08:56)

MINUTE(000065),sihm.hh(08),sihm.mm(55)=HH:MM(08:55)

MINUTE(000066),sihm.hh(08),sihm.mm(54)=HH:MM(08:54)

MINUTE(000067),sihm.hh(08),sihm.mm(53)=HH:MM(08:53)

MINUTE(000068),sihm.hh(08),sihm.mm(52)=HH:MM(08:52)

MINUTE(000069),sihm.hh(08),sihm.mm(51)=HH:MM(08:51)

MINUTE(000070),sihm.hh(08),sihm.mm(50)=HH:MM(08:50)

MINUTE(000071),sihm.hh(08),sihm.mm(49)=HH:MM(08:49)

MINUTE(000072),sihm.hh(08),sihm.mm(48)=HH:MM(08:48)

MINUTE(000073),sihm.hh(08),sihm.mm(47)=HH:MM(08:47)

MINUTE(000074),sihm.hh(08),sihm.mm(46)=HH:MM(08:46)

MINUTE(000075),sihm.hh(08),sihm.mm(45)=HH:MM(08:45)

MINUTE(000076),sihm.hh(08),sihm.mm(44)=HH:MM(08:44)

MINUTE(000077),sihm.hh(08),sihm.mm(43)=HH:MM(08:43)

MINUTE(000078),sihm.hh(08),sihm.mm(42)=HH:MM(08:42)

MINUTE(000079),sihm.hh(08),sihm.mm(41)=HH:MM(08:41)

MINUTE(000080),sihm.hh(08),sihm.mm(40)=HH:MM(08:40)

MINUTE(000081),sihm.hh(08),sihm.mm(39)=HH:MM(08:39)

MINUTE(000082),sihm.hh(08),sihm.mm(38)=HH:MM(08:38)

MINUTE(000083),sihm.hh(08),sihm.mm(37)=HH:MM(08:37)

MINUTE(000084),sihm.hh(08),sihm.mm(36)=HH:MM(08:36)

MINUTE(000085),sihm.hh(08),sihm.mm(35)=HH:MM(08:35)

MINUTE(000086),sihm.hh(08),sihm.mm(34)=HH:MM(08:34)

MINUTE(000087),sihm.hh(08),sihm.mm(33)=HH:MM(08:33)

MINUTE(000088),sihm.hh(08),sihm.mm(32)=HH:MM(08:32)

MINUTE(000089),sihm.hh(08),sihm.mm(31)=HH:MM(08:31)

MINUTE(000090),sihm.hh(08),sihm.mm(30)=HH:MM(08:30)

MINUTE(000091),sihm.hh(08),sihm.mm(29)=HH:MM(08:29)

MINUTE(000092),sihm.hh(08),sihm.mm(28)=HH:MM(08:28)

MINUTE(000093),sihm.hh(08),sihm.mm(27)=HH:MM(08:27)

MINUTE(000094),sihm.hh(08),sihm.mm(26)=HH:MM(08:26)

MINUTE(000095),sihm.hh(08),sihm.mm(25)=HH:MM(08:25)

MINUTE(000096),sihm.hh(08),sihm.mm(24)=HH:MM(08:24)

MINUTE(000097),sihm.hh(08),sihm.mm(23)=HH:MM(08:23)

MINUTE(000098),sihm.hh(08),sihm.mm(22)=HH:MM(08:22)

MINUTE(000099),sihm.hh(08),sihm.mm(21)=HH:MM(08:21)

MINUTE(000100),sihm.hh(08),sihm.mm(20)=HH:MM(08:20)

MINUTE(000101),sihm.hh(08),sihm.mm(19)=HH:MM(08:19)

MINUTE(000102),sihm.hh(08),sihm.mm(18)=HH:MM(08:18)

MINUTE(000103),sihm.hh(08),sihm.mm(17)=HH:MM(08:17)

MINUTE(000104),sihm.hh(08),sihm.mm(16)=HH:MM(08:16)

MINUTE(000105),sihm.hh(08),sihm.mm(15)=HH:MM(08:15)

MINUTE(000106),sihm.hh(08),sihm.mm(14)=HH:MM(08:14)

MINUTE(000107),sihm.hh(08),sihm.mm(13)=HH:MM(08:13)

MINUTE(000108),sihm.hh(08),sihm.mm(12)=HH:MM(08:12)

MINUTE(000109),sihm.hh(08),sihm.mm(11)=HH:MM(08:11)

MINUTE(000110),sihm.hh(08),sihm.mm(10)=HH:MM(08:10)

MINUTE(000111),sihm.hh(08),sihm.mm(09)=HH:MM(08:09)

MINUTE(000112),sihm.hh(08),sihm.mm(08)=HH:MM(08:08)

MINUTE(000113),sihm.hh(08),sihm.mm(07)=HH:MM(08:07)

MINUTE(000114),sihm.hh(08),sihm.mm(06)=HH:MM(08:06)

MINUTE(000115),sihm.hh(08),sihm.mm(05)=HH:MM(08:05)

MINUTE(000116),sihm.hh(08),sihm.mm(04)=HH:MM(08:04)

MINUTE(000117),sihm.hh(08),sihm.mm(03)=HH:MM(08:03)

MINUTE(000118),sihm.hh(08),sihm.mm(02)=HH:MM(08:02)

MINUTE(000119),sihm.hh(08),sihm.mm(01)=HH:MM(08:01)

MINUTE(000120),sihm.hh(08),sihm.mm(00)=HH:MM(08:00)

MINUTE(000121),sihm.hh(07),sihm.mm(59)=HH:MM(07:59)

MINUTE(000122),sihm.hh(07),sihm.mm(58)=HH:MM(07:58)

MINUTE(000123),sihm.hh(07),sihm.mm(57)=HH:MM(07:57)

MINUTE(000124),sihm.hh(07),sihm.mm(56)=HH:MM(07:56)

MINUTE(000125),sihm.hh(07),sihm.mm(55)=HH:MM(07:55)

MINUTE(000126),sihm.hh(07),sihm.mm(54)=HH:MM(07:54)

MINUTE(000127),sihm.hh(07),sihm.mm(53)=HH:MM(07:53)

MINUTE(000128),sihm.hh(07),sihm.mm(52)=HH:MM(07:52)

MINUTE(000129),sihm.hh(07),sihm.mm(51)=HH:MM(07:51)

MINUTE(000130),sihm.hh(07),sihm.mm(50)=HH:MM(07:50)

MINUTE(000131),sihm.hh(07),sihm.mm(49)=HH:MM(07:49)

MINUTE(000132),sihm.hh(07),sihm.mm(48)=HH:MM(07:48)

MINUTE(000133),sihm.hh(07),sihm.mm(47)=HH:MM(07:47)

MINUTE(000134),sihm.hh(07),sihm.mm(46)=HH:MM(07:46)

MINUTE(000135),sihm.hh(07),sihm.mm(45)=HH:MM(07:45)

MINUTE(000136),sihm.hh(07),sihm.mm(44)=HH:MM(07:44)

MINUTE(000137),sihm.hh(07),sihm.mm(43)=HH:MM(07:43)

MINUTE(000138),sihm.hh(07),sihm.mm(42)=HH:MM(07:42)

MINUTE(000139),sihm.hh(07),sihm.mm(41)=HH:MM(07:41)

MINUTE(000140),sihm.hh(07),sihm.mm(40)=HH:MM(07:40)

MINUTE(000141),sihm.hh(07),sihm.mm(39)=HH:MM(07:39)

MINUTE(000142),sihm.hh(07),sihm.mm(38)=HH:MM(07:38)

MINUTE(000143),sihm.hh(07),sihm.mm(37)=HH:MM(07:37)

MINUTE(000144),sihm.hh(07),sihm.mm(36)=HH:MM(07:36)

MINUTE(000145),sihm.hh(07),sihm.mm(35)=HH:MM(07:35)

MINUTE(000146),sihm.hh(07),sihm.mm(34)=HH:MM(07:34)

MINUTE(000147),sihm.hh(07),sihm.mm(33)=HH:MM(07:33)

MINUTE(000148),sihm.hh(07),sihm.mm(32)=HH:MM(07:32)

MINUTE(000149),sihm.hh(07),sihm.mm(31)=HH:MM(07:31)

MINUTE(000150),sihm.hh(07),sihm.mm(30)=HH:MM(07:30)

MINUTE(000151),sihm.hh(07),sihm.mm(29)=HH:MM(07:29)

MINUTE(000152),sihm.hh(07),sihm.mm(28)=HH:MM(07:28)

MINUTE(000153),sihm.hh(07),sihm.mm(27)=HH:MM(07:27)

MINUTE(000154),sihm.hh(07),sihm.mm(26)=HH:MM(07:26)

MINUTE(000155),sihm.hh(07),sihm.mm(25)=HH:MM(07:25)

MINUTE(000156),sihm.hh(07),sihm.mm(24)=HH:MM(07:24)

MINUTE(000157),sihm.hh(07),sihm.mm(23)=HH:MM(07:23)

MINUTE(000158),sihm.hh(07),sihm.mm(22)=HH:MM(07:22)

MINUTE(000159),sihm.hh(07),sihm.mm(21)=HH:MM(07:21)

MINUTE(000160),sihm.hh(07),sihm.mm(20)=HH:MM(07:20)

MINUTE(000161),sihm.hh(07),sihm.mm(19)=HH:MM(07:19)

MINUTE(000162),sihm.hh(07),sihm.mm(18)=HH:MM(07:18)

MINUTE(000163),sihm.hh(07),sihm.mm(17)=HH:MM(07:17)

MINUTE(000164),sihm.hh(07),sihm.mm(16)=HH:MM(07:16)

MINUTE(000165),sihm.hh(07),sihm.mm(15)=HH:MM(07:15)

MINUTE(000166),sihm.hh(07),sihm.mm(14)=HH:MM(07:14)

MINUTE(000167),sihm.hh(07),sihm.mm(13)=HH:MM(07:13)

MINUTE(000168),sihm.hh(07),sihm.mm(12)=HH:MM(07:12)

MINUTE(000169),sihm.hh(07),sihm.mm(11)=HH:MM(07:11)

MINUTE(000170),sihm.hh(07),sihm.mm(10)=HH:MM(07:10)

MINUTE(000171),sihm.hh(07),sihm.mm(09)=HH:MM(07:09)

MINUTE(000172),sihm.hh(07),sihm.mm(08)=HH:MM(07:08)

MINUTE(000173),sihm.hh(07),sihm.mm(07)=HH:MM(07:07)

MINUTE(000174),sihm.hh(07),sihm.mm(06)=HH:MM(07:06)

MINUTE(000175),sihm.hh(07),sihm.mm(05)=HH:MM(07:05)

MINUTE(000176),sihm.hh(07),sihm.mm(04)=HH:MM(07:04)

MINUTE(000177),sihm.hh(07),sihm.mm(03)=HH:MM(07:03)

MINUTE(000178),sihm.hh(07),sihm.mm(02)=HH:MM(07:02)

MINUTE(000179),sihm.hh(07),sihm.mm(01)=HH:MM(07:01)

MINUTE(000180),sihm.hh(07),sihm.mm(00)=HH:MM(07:00)

MINUTE(000181),sihm.hh(06),sihm.mm(59)=HH:MM(06:59)

MINUTE(000182),sihm.hh(06),sihm.mm(58)=HH:MM(06:58)

MINUTE(000183),sihm.hh(06),sihm.mm(57)=HH:MM(06:57)

MINUTE(000184),sihm.hh(06),sihm.mm(56)=HH:MM(06:56)

MINUTE(000185),sihm.hh(06),sihm.mm(55)=HH:MM(06:55)

MINUTE(000186),sihm.hh(06),sihm.mm(54)=HH:MM(06:54)

MINUTE(000187),sihm.hh(06),sihm.mm(53)=HH:MM(06:53)

MINUTE(000188),sihm.hh(06),sihm.mm(52)=HH:MM(06:52)

MINUTE(000189),sihm.hh(06),sihm.mm(51)=HH:MM(06:51)

MINUTE(000190),sihm.hh(06),sihm.mm(50)=HH:MM(06:50)

MINUTE(000191),sihm.hh(06),sihm.mm(49)=HH:MM(06:49)

MINUTE(000192),sihm.hh(06),sihm.mm(48)=HH:MM(06:48)

MINUTE(000193),sihm.hh(06),sihm.mm(47)=HH:MM(06:47)

MINUTE(000194),sihm.hh(06),sihm.mm(46)=HH:MM(06:46)

MINUTE(000195),sihm.hh(06),sihm.mm(45)=HH:MM(06:45)

MINUTE(000196),sihm.hh(06),sihm.mm(44)=HH:MM(06:44)

MINUTE(000197),sihm.hh(06),sihm.mm(43)=HH:MM(06:43)

MINUTE(000198),sihm.hh(06),sihm.mm(42)=HH:MM(06:42)

MINUTE(000199),sihm.hh(06),sihm.mm(41)=HH:MM(06:41)

MINUTE(000200),sihm.hh(06),sihm.mm(40)=HH:MM(06:40)

MINUTE(000201),sihm.hh(06),sihm.mm(39)=HH:MM(06:39)

MINUTE(000202),sihm.hh(06),sihm.mm(38)=HH:MM(06:38)

MINUTE(000203),sihm.hh(06),sihm.mm(37)=HH:MM(06:37)

MINUTE(000204),sihm.hh(06),sihm.mm(36)=HH:MM(06:36)

MINUTE(000205),sihm.hh(06),sihm.mm(35)=HH:MM(06:35)

MINUTE(000206),sihm.hh(06),sihm.mm(34)=HH:MM(06:34)

MINUTE(000207),sihm.hh(06),sihm.mm(33)=HH:MM(06:33)

MINUTE(000208),sihm.hh(06),sihm.mm(32)=HH:MM(06:32)

MINUTE(000209),sihm.hh(06),sihm.mm(31)=HH:MM(06:31)

MINUTE(000210),sihm.hh(06),sihm.mm(30)=HH:MM(06:30)

MINUTE(000211),sihm.hh(06),sihm.mm(29)=HH:MM(06:29)

MINUTE(000212),sihm.hh(06),sihm.mm(28)=HH:MM(06:28)

MINUTE(000213),sihm.hh(06),sihm.mm(27)=HH:MM(06:27)

MINUTE(000214),sihm.hh(06),sihm.mm(26)=HH:MM(06:26)

MINUTE(000215),sihm.hh(06),sihm.mm(25)=HH:MM(06:25)

MINUTE(000216),sihm.hh(06),sihm.mm(24)=HH:MM(06:24)

MINUTE(000217),sihm.hh(06),sihm.mm(23)=HH:MM(06:23)

MINUTE(000218),sihm.hh(06),sihm.mm(22)=HH:MM(06:22)

MINUTE(000219),sihm.hh(06),sihm.mm(21)=HH:MM(06:21)

MINUTE(000220),sihm.hh(06),sihm.mm(20)=HH:MM(06:20)

MINUTE(000221),sihm.hh(06),sihm.mm(19)=HH:MM(06:19)

MINUTE(000222),sihm.hh(06),sihm.mm(18)=HH:MM(06:18)

MINUTE(000223),sihm.hh(06),sihm.mm(17)=HH:MM(06:17)

MINUTE(000224),sihm.hh(06),sihm.mm(16)=HH:MM(06:16)

MINUTE(000225),sihm.hh(06),sihm.mm(15)=HH:MM(06:15)

MINUTE(000226),sihm.hh(06),sihm.mm(14)=HH:MM(06:14)

MINUTE(000227),sihm.hh(06),sihm.mm(13)=HH:MM(06:13)

MINUTE(000228),sihm.hh(06),sihm.mm(12)=HH:MM(06:12)

MINUTE(000229),sihm.hh(06),sihm.mm(11)=HH:MM(06:11)

MINUTE(000230),sihm.hh(06),sihm.mm(10)=HH:MM(06:10)

MINUTE(000231),sihm.hh(06),sihm.mm(09)=HH:MM(06:09)

MINUTE(000232),sihm.hh(06),sihm.mm(08)=HH:MM(06:08)

MINUTE(000233),sihm.hh(06),sihm.mm(07)=HH:MM(06:07)

MINUTE(000234),sihm.hh(06),sihm.mm(06)=HH:MM(06:06)

MINUTE(000235),sihm.hh(06),sihm.mm(05)=HH:MM(06:05)

MINUTE(000236),sihm.hh(06),sihm.mm(04)=HH:MM(06:04)

MINUTE(000237),sihm.hh(06),sihm.mm(03)=HH:MM(06:03)

MINUTE(000238),sihm.hh(06),sihm.mm(02)=HH:MM(06:02)

MINUTE(000239),sihm.hh(06),sihm.mm(01)=HH:MM(06:01)

MINUTE(000240),sihm.hh(06),sihm.mm(00)=HH:MM(06:00)

MINUTE(000241),sihm.hh(05),sihm.mm(59)=HH:MM(05:59)

MINUTE(000242),sihm.hh(05),sihm.mm(58)=HH:MM(05:58)

MINUTE(000243),sihm.hh(05),sihm.mm(57)=HH:MM(05:57)

MINUTE(000244),sihm.hh(05),sihm.mm(56)=HH:MM(05:56)

MINUTE(000245),sihm.hh(05),sihm.mm(55)=HH:MM(05:55)

MINUTE(000246),sihm.hh(05),sihm.mm(54)=HH:MM(05:54)

MINUTE(000247),sihm.hh(05),sihm.mm(53)=HH:MM(05:53)

MINUTE(000248),sihm.hh(05),sihm.mm(52)=HH:MM(05:52)

MINUTE(000249),sihm.hh(05),sihm.mm(51)=HH:MM(05:51)

MINUTE(000250),sihm.hh(05),sihm.mm(50)=HH:MM(05:50)

MINUTE(000251),sihm.hh(05),sihm.mm(49)=HH:MM(05:49)

MINUTE(000252),sihm.hh(05),sihm.mm(48)=HH:MM(05:48)

MINUTE(000253),sihm.hh(05),sihm.mm(47)=HH:MM(05:47)

MINUTE(000254),sihm.hh(05),sihm.mm(46)=HH:MM(05:46)

MINUTE(000255),sihm.hh(05),sihm.mm(45)=HH:MM(05:45)

MINUTE(000256),sihm.hh(05),sihm.mm(44)=HH:MM(05:44)

MINUTE(000257),sihm.hh(05),sihm.mm(43)=HH:MM(05:43)

MINUTE(000258),sihm.hh(05),sihm.mm(42)=HH:MM(05:42)

MINUTE(000259),sihm.hh(05),sihm.mm(41)=HH:MM(05:41)

MINUTE(000260),sihm.hh(05),sihm.mm(40)=HH:MM(05:40)

MINUTE(000261),sihm.hh(05),sihm.mm(39)=HH:MM(05:39)

MINUTE(000262),sihm.hh(05),sihm.mm(38)=HH:MM(05:38)

MINUTE(000263),sihm.hh(05),sihm.mm(37)=HH:MM(05:37)

MINUTE(000264),sihm.hh(05),sihm.mm(36)=HH:MM(05:36)

MINUTE(000265),sihm.hh(05),sihm.mm(35)=HH:MM(05:35)

MINUTE(000266),sihm.hh(05),sihm.mm(34)=HH:MM(05:34)

MINUTE(000267),sihm.hh(05),sihm.mm(33)=HH:MM(05:33)

MINUTE(000268),sihm.hh(05),sihm.mm(32)=HH:MM(05:32)

MINUTE(000269),sihm.hh(05),sihm.mm(31)=HH:MM(05:31)

MINUTE(000270),sihm.hh(05),sihm.mm(30)=HH:MM(05:30)

MINUTE(000271),sihm.hh(05),sihm.mm(29)=HH:MM(05:29)

MINUTE(000272),sihm.hh(05),sihm.mm(28)=HH:MM(05:28)

MINUTE(000273),sihm.hh(05),sihm.mm(27)=HH:MM(05:27)

MINUTE(000274),sihm.hh(05),sihm.mm(26)=HH:MM(05:26)

MINUTE(000275),sihm.hh(05),sihm.mm(25)=HH:MM(05:25)

MINUTE(000276),sihm.hh(05),sihm.mm(24)=HH:MM(05:24)

MINUTE(000277),sihm.hh(05),sihm.mm(23)=HH:MM(05:23)

MINUTE(000278),sihm.hh(05),sihm.mm(22)=HH:MM(05:22)

MINUTE(000279),sihm.hh(05),sihm.mm(21)=HH:MM(05:21)

MINUTE(000280),sihm.hh(05),sihm.mm(20)=HH:MM(05:20)

MINUTE(000281),sihm.hh(05),sihm.mm(19)=HH:MM(05:19)

MINUTE(000282),sihm.hh(05),sihm.mm(18)=HH:MM(05:18)

MINUTE(000283),sihm.hh(05),sihm.mm(17)=HH:MM(05:17)

MINUTE(000284),sihm.hh(05),sihm.mm(16)=HH:MM(05:16)

MINUTE(000285),sihm.hh(05),sihm.mm(15)=HH:MM(05:15)

MINUTE(000286),sihm.hh(05),sihm.mm(14)=HH:MM(05:14)

MINUTE(000287),sihm.hh(05),sihm.mm(13)=HH:MM(05:13)

MINUTE(000288),sihm.hh(05),sihm.mm(12)=HH:MM(05:12)

MINUTE(000289),sihm.hh(05),sihm.mm(11)=HH:MM(05:11)

MINUTE(000290),sihm.hh(05),sihm.mm(10)=HH:MM(05:10)

MINUTE(000291),sihm.hh(05),sihm.mm(09)=HH:MM(05:09)

MINUTE(000292),sihm.hh(05),sihm.mm(08)=HH:MM(05:08)

MINUTE(000293),sihm.hh(05),sihm.mm(07)=HH:MM(05:07)

MINUTE(000294),sihm.hh(05),sihm.mm(06)=HH:MM(05:06)

MINUTE(000295),sihm.hh(05),sihm.mm(05)=HH:MM(05:05)

MINUTE(000296),sihm.hh(05),sihm.mm(04)=HH:MM(05:04)

MINUTE(000297),sihm.hh(05),sihm.mm(03)=HH:MM(05:03)

MINUTE(000298),sihm.hh(05),sihm.mm(02)=HH:MM(05:02)

MINUTE(000299),sihm.hh(05),sihm.mm(01)=HH:MM(05:01)

bash-3.1$

*/

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gcc -o sample sample.o -lm 시에 m의 의미는?

라이브러리파일을 찾기위한 하나의 INDEX 문자열이다.

#include <math.h> 는 헤더이고, 오브젝트는 libm.a입니다.

여기에서, lib와 .a사이에 문자열스트링을 가지고 LINK시에 파일을 참조해서 LINK합니다.

예를 들어 다음과 같은 함수의 프로토타입은 math.h에 선언되어져 있어서 compile시에 성공적으로 수행되지만,

실제 LINK에는 라이브러리 파일의 오브젝트를 참조하기때문에 헤더와 라이브러리 오브젝트는 분리되어 있습니다.

ㅡㅡㅡㅡㅡㅡㅡㅡsin함수의 프로토타입(math.h에 선언되어져 있습니다.)ㅡㅡㅡㅡㅡㅡ

double sin(double x); sine 계산

float sinf(float x); sine 계산

long double sinl(long double x); sine 계산

입력 매개 변수 리스트 : x radian

반환 값 : sine 값

ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ

sin함수의 구현은 libm.a에 바이너리형태로 구현되어 있습니다.

(오브젝트파일 -> 아카이브파일로 묶여있음)

bash-3.1$

bash-3.1$ find ./ -name libm.*

find: `./Documents and Settings': Permission denied

./MinGW/lib/libm.a (반드시 LINK할 디렉토리는 Makefile PATH에 설정되어 있어야 합니다.

find: `./Program Files/Windows NT/\272\270\301\266\307\301\267\316\261\327\267\245': Permission denied

find: File system loop detected; `./ProgramData/Application Data' is part of the same file system loop as `./ProgramData'.

find: `./ProgramData/Desktop': Permission denied

find: `./ProgramData/Documents': Permission denied

find: `./ProgramData/Favorites': Permission denied

find: `./ProgramData/Microsoft/Diagnosis/SoftLanding': Permission denied

find: `./ProgramData/Microsoft/Diagnosis/SoftLandingStage': Permission denied

find: `./ProgramData/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./ProgramData/Start Menu': Permission denied

find: `./ProgramData/Templates': Permission denied

find: `./ProgramData/\271\331\305\301 \310\255\270\351': Permission denied

find: `./ProgramData/\275\303\300\333 \270\336\264\272': Permission denied

find: `./System Volume Information': Permission denied

find: File system loop detected; `./Users/All Users/Application Data' is part of the same file system loop as `./Users/All Users'.

find: `./Users/All Users/Desktop': Permission denied

find: `./Users/All Users/Documents': Permission denied

find: `./Users/All Users/Favorites': Permission denied

find: `./Users/All Users/Microsoft/Diagnosis/SoftLanding': Permission denied

find: `./Users/All Users/Microsoft/Diagnosis/SoftLandingStage': Permission denied

find: `./Users/All Users/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./Users/All Users/Start Menu': Permission denied

find: `./Users/All Users/Templates': Permission denied

find: `./Users/All Users/\271\331\305\301 \310\255\270\351': Permission denied

find: `./Users/All Users/\275\303\300\333 \270\336\264\272': Permission denied

find: File system loop detected; `./Users/Default/AppData/Local/Application Data' is part of the same file system loop as `./Users/Default/AppData/Local'.

find: `./Users/Default/AppData/Local/History': Permission denied

find: `./Users/Default/AppData/Local/Temporary Internet Files': Permission denied

find: `./Users/Default/AppData/Roaming/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./Users/Default/Application Data': Permission denied

find: `./Users/Default/Cookies': Permission denied

find: `./Users/Default/Documents/My Music': Permission denied

find: `./Users/Default/Documents/My Pictures': Permission denied

find: `./Users/Default/Documents/My Videos': Permission denied

find: `./Users/Default/Local Settings': Permission denied

find: `./Users/Default/My Documents': Permission denied

find: `./Users/Default/NetHood': Permission denied

find: `./Users/Default/PrintHood': Permission denied

find: `./Users/Default/Recent': Permission denied

find: `./Users/Default/SendTo': Permission denied

find: `./Users/Default/Start Menu': Permission denied

find: `./Users/Default/Templates': Permission denied

find: `./Users/Default/\275\303\300\333 \270\336\264\272': Permission denied

find: `./Users/Default User': Permission denied

find: `./Users/Public/Documents/My Music': Permission denied

find: `./Users/Public/Documents/My Pictures': Permission denied

find: `./Users/Public/Documents/My Videos': Permission denied

find: `./Windows/CSC/v2.0.6': Permission denied

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/*

LINUX,SERVER,SELECT(RECV),SELECT(SEND)

*/

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <signal.h>

#include <sys/socket.h>

#include <sys/file.h>

#include <netinet/in.h>

#include <string.h>

#define MAXLINE 512

#define MAX_SOCK 64

char *escapechar = "exit";

int maxfdp1;

int g_num_chat = 0;

int s;

int client_s[MAX_SOCK];

static int getmax(int);

static void removeclient(int);

static int getdottedipaddr(int sd, struct sockaddr_in *addr);

static void my_signal(int signo);

int main(int argc, char *argv[])

{

char rline[MAXLINE+1];

char *start = "Connected to chat-server\n";

int i, j, n;

int client_fd, clilen;

fd_set read_fds;

struct sockaddr_in client_addr, server_addr;

if (argc != 2) {

printf("usage : %s port\n", argv[0]);

return(-1);

}

if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {

printf("can't open stream socket.");

return(-2);

}

bzero((char *)&server_addr, sizeof(server_addr));

server_addr.sin_family = AF_INET;

server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

server_addr.sin_port = htons(atoi(argv[1]));

if (bind(s, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {

printf("Server: Can't bind local address.\n");

return(-3);

}

if (signal(SIGINT, my_signal) == SIG_ERR) { /* Ctrl+C */

printf("Server: signal(SIGINT) error\n");

return(-4);

}

if (signal(SIGTERM, my_signal) == SIG_ERR) { /* software termination */

printf("Server: signal(SIGTERM) error\n");

return(-5);

}

if (signal(SIGQUIT, my_signal) == SIG_ERR) { /* Ctrl+\ */

printf("Server: signal(SIGQUIT) error\n");

return(-6);

}

listen(s, 5); /* backlog = 5 */

maxfdp1 = s + 1;

while (1)

{

FD_ZERO(&read_fds);

FD_SET(s, &read_fds);

for (ii=0; ii < g_num_chat; ii++)

{

FD_SET(client_s[ii], &read_fds);

}

maxfdp1 = getmax(s) + 1; /* maxfdp1 재 계산 */

/*wait & response*/

if (select(maxfdp1, &read_fds, (fd_set *)0, (fd_set *)0, (struct timeval *)0) < 0)

{

printf("select error.\n");

break;

}

if (FD_ISSET(s, &read_fds))

{

clilen = sizeof(client_addr);

client_fd = accept(s, (struct sockaddr *)&client_addr, &clilen);

if (client_fd == -1)

{

printf("server: accept error\n");

break;

}

client_s[g_num_chat] = client_fd;

g_num_chat++;

/*welcome message*/

send(client_fd, start, strlen(start), 0);

if (getdottedipaddr(client_fd, &client_addr) > -1)

printf("%d number additional(IP: %s)\n", g_num_chat, inet_ntoa(client_addr.sin_addr));

else

printf("%d number additional\n", g_num_chat);

}

for (ii=0; ii<g_num_chat; ii++)

{

if (FD_ISSET(client_s[ii], &read_fds))

{

if ((n = recv(client_s[ii], rline, MAXLINE, 0)) <= 0)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

rline[n] = '\0';

if (strstr(rline, escapechar) != NULL)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

for (kk=0; kk<g_num_chat; kk++)

{

send(client_s[kk], rline, n, 0);

}

if (getdottedipaddr(client_fd, &client_addr) > -1)

printf("IP: %s -> %s", inet_ntoa(client_addr.sin_addr), rline);

else

printf("%s", rline);

}

} /* while */

my_signal(SIGIO);

}

void removeclient(int indx)

{

struct sockaddr_in client_addr;

if (getdottedipaddr(client_s[indx], &client_addr) > -1)

printf("1 number expired!!(IP: %s).", inet_ntoa(client_addr.sin_addr));

else

printf("1 number expired!!.");

close(client_s[indx]);

if (indx != g_num_chat-1) client_s[indx] = client_s[g_num_chat-1];

g_num_chat--;

printf("now number = %d\n", g_num_chat);

}

int getmax(int k) {

int max = k;

int r;

for (r=0; r < g_num_chat; r++)

{

if (client_s[r] > max) max = client_s[r];

}

return max;

}

/* 소켓에 연결된 상대방 주소를 알아낸다 */

int getdottedipaddr(int sd, struct sockaddr_in *addr) {

struct sockaddr_in client_addr;

int len, r;

len = sizeof(client_addr);

if ((r = getpeername(sd, (struct sockaddr *)&client_addr, &len)) == 0)

{

*addr = client_addr;

}

return r;

}

/* 시그널 처리 함수 정의 */

void my_signal(int signo)

{

int ii;

/* 대부분의 시그널(SIGILL과 SIGTRAP 은 제외)에 대한 처리 함수는 시그널이 포작된 후

즉시 재지정된다. 이것은 프로세스가 시그널의 처리 함수를 잊어버리고, 다음에 시그널이

도착하면 묵시적 처리함수인 SIG_DFL 을 수행하는 것을 의미한다.

이것은 특히 사용자가 인터럽트키를 여러번 누를 수도 있는 대화명 프로그램에서 문제가 된다

그러므로 시그널 함수가 호출되자 마자 SIGINT 시그널을 무시한다 */

signal(SIGINT, SIG_IGN);

signal(SIGTERM, SIG_IGN);

signal(SIGQUIT, SIG_IGN);

close(s);

for (ii=0; ii < g_num_chat; ii++)

{

close(client_s[ii]);

}

exit(0);

}

/*----------------------------------------------------------------------------------------------------

socket function : accept

1. 소켓에 연결을 받아들인다.

#include <sys/types.h>

#include <sys/socket.h>

int accept(int s, struct sockaddr *addr, socklen_t *addrlen);

2. 설명

accept() 함수는 연결지향 소켓 타입 (SOCK_STREAM, SOCK_SEQPACKET, SOCK_RDM)에 사용된다.

이것은 아직 처리되지 않은 연결들이 대기하고 있는 큐에서 제일 처음 연결된 연결을 가져와서 새로운 연결된 소켓을 만든다.

그리고 소켓을 가르키는 파일 지정자를 할당하고 이것을 리턴한다.

인자 s 는 socket() 로 만들어진 end-point(듣기 소켓)을 위한 파일지정자이다.

인자 addr 는 sockaddr 구조체에 대한 포인터이다.

연결이 성공되면 이 구조체를 채워서 되돌려 주게 되고,

우리는 이구조체의 정보를 이용해서 연결된 클라이언트의 인터넷 정보를 알아낼수 있다. addrlen 인자는 addr의 크기 이다.

만약 미결인 연결이 큐에 존재하지 않고, 소켓이 비봉쇄가 아니라면 accept 는 연결이 존재할때까지 해당영역에서 봉쇄된다.

비봉쇄 소켓일경우에는 errno 로 EAGAIN 을 설정하고 바로 리턴한다.

3. 반환값

에러시 -1이 반환된다. 성공한다면 받아들인 소켓을 위한 파일지정번호 (0보다 큰)을 반환한다.

---------------------------------*/

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/*

LINUX,MULTICAST,UDP SERVER

*/

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <time.h>

#include <errno.h>

#include <fcntl.h>

#include <signal.h>

#include <setjmp.h>

#include <unistd.h>

#include <ctype.h>

#include <sys/ipc.h>

#include <sys/msg.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <netdb.h>

#include <sys/shm.h>

/*------------------------------------------------------------------------------------

TR_CODE DESC FRAME_ID MULTICAST_GROUP REAL_PORT

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19711

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19712

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19713

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19714

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19715

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19716

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19717

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19718

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19719

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19720

------------------------------------------------------------------------------------*/

/*USAGE------------------------------------------------------------------------------------

rcvmulticastdata 233.37.54.51 19711

rcvmulticastdata 233.37.54.51 19712

rcvmulticastdata 233.37.54.51 19713

rcvmulticastdata 233.37.54.51 19714

rcvmulticastdata 233.37.54.51 19715

rcvmulticastdata 233.37.54.51 19716

rcvmulticastdata 233.37.54.51 19717

..

------------------------------------------------------------------------------------*/

int main(int argc, char *argv[])

{

int send_s, recv_s;

unsigned int yes=1, ttl=32;

struct sockaddr_in mcast_group;

struct ip_mreq mreq;

struct sockaddr_in from;

int rlen, len, rtn;

if (argc != 3) {

printf("usage : %s multicastaddr port &\n", argv[0]);

exit(0);

}

for (;;)

{

//socket for multicast receive

memset((char *)&mcast_group, 0, sizeof(mcast_group));

mcast_group.sin_family = AF_INET;

mcast_group.sin_port = htons(atoi(argv[2]));

mcast_group.sin_addr.s_addr = inet_addr(argv[1]);

if ((recv_s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)

{

printf("error: can't create receive socket\n");

exit(0);

}

//multicast group register, and multicast network is defind by root user

mreq.imr_multiaddr = mcast_group.sin_addr;

//mreq.imr_interface.s_addr = htonl(INADDR_ANY);

//"192.178.33.142" is multicast network interface

mreq.imr_interface.s_addr = inet_addr("192.178.33.142");

if (setsockopt(recv_s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)

{

printf("error: add membership\n");

exit(0);

}

//socket re-use option set

if (setsockopt(recv_s, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0)

{

printf("error: so_reuseaddr setsockopt\n");

exit(0);

}

//socket bind

if (bind(recv_s, (struct sockaddr*)&mcast_group, sizeof(mcast_group)) < 0) {

printf("error: bind receive socket\n");

exit(0);

}

for (;;)

{

len = sizeof(from);

if ((rlen = recvfrom(recv_s, rbuf, SZ_MAX, 0, (struct sockaddr *)&from, &len)) < 0)

{

printf("error: recvfrom\n");

exit(0);

}

rbuf[rlen] = '\0';

printf("%s\n", rbuf);

}

close(recv_s);

usleep(1000);

}

return(0);

}

[Tip] semop() 세마포어 값을 변경

--------------------------------------------------------------------------------------------------------------------------

설명

--------------------------------------------------------------------------------------------------------------------------

semop() 함수는 세마포어의 값을 변경합니다. 세마포어를 사용하기 위해서는

먼저 세마포어 값을 1 감소시키고, 사용 후에는 1 증가시키는데, 이렇게 세마포어값을 증감하는 것을 요청하는 함수입니다.

--------------------------------------------------------------------------------------------------------------------------

헤더

--------------------------------------------------------------------------------------------------------------------------

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/sem.h>

--------------------------------------------------------------------------------------------------------------------------

형태

--------------------------------------------------------------------------------------------------------------------------

int semop ( int semid, struct sembuf *sops, unsigned nsops )

--------------------------------------------------------------------------------------------------------------------------

인수

--------------------------------------------------------------------------------------------------------------------------

int semid 시스템에서 세머포어를 식별하는 집합 번호

struct sembuf *sops

세마포어 값을 계사하기위한 설정 값

struct sembuf {

short sem_num; 세마포어 번호

short sem_op; 세마포어 증감값

short sem_flg; 옵션

}

sem_flg sem_flg 내용

IPC_NOWAIT

호출 즉시 실행하지 못했을 경우 기다리지 않고 실패로 바로 복귀합니다.

SEM_UNDO 프로세스가 종료되면 시스템에서 세마포어 설저을 원래 상태로 되돌립니다. 그러므로 보통 이 옵션을 사용합니다.

unsigned nsops

변경하려는 세마포어 개수로 변경하려는 세마포어 개수가 여러 개일 때 사용합니다.

예를 들어 변경하려는 세마포어 개수가 한 개라면

struct sembuf sbuf = { 0, -1, 0};

semop( semmop, &sbuf, 1);

이렇게 값이 1이 되지만 한번에 2개 이상의 세마포어를 변경한다면,

struct sembuf pbuf[2] = {

{ 0, 1, 0} , // 첫번째 세마포어 값을 1 증가

{ 1, -1, 0} // 두번째 세마포어 값을 1 감소

}

semop( semmop, pbuf, 2);

--------------------------------------------------------------------------------------------------------------------------

반환

--------------------------------------------------------------------------------------------------------------------------

0 성공

-1 실패

--------------------------------------------------------------------------------------------------------------------------

예제

--------------------------------------------------------------------------------------------------------------------------

예제에서는 두개의 쓰레드를 만들어 첫번째 쓰레드는 카운터 값을 증가 시키고 두번째 쓰레드는 카운터를 화면에 출력합니다.

카운터가 5 이상의 값이 되면 두 개의 쓰레드는 모두 종료하고 프로그램이 종료되면서 세마포어를 삭제합니다.

여기서 세마포어는 각각의 쓰레드가 독립적으로 실행될수 있음을 보장하는 역할을 수행한다.

#include <pthread.h>

#include <stdlib.h>

#include <unistd.h>

#include <stdio.h>

#include <sys/ipc.h>

#include <sys/sem.h>

int cnt = 0;

static int semid;

void p()

{

struct sembuf pbuf;

pbuf.sem_num = 0;

pbuf.sem_op = -1;

pbuf.sem_flg = SEM_UNDO;

if ( -1 == semop(semid, &pbuf, 1))

printf( "p()-semop() 실행 오류\n");

}

void v()

{

struct sembuf vbuf;

vbuf.sem_num = 0;

vbuf.sem_op = 1;

vbuf.sem_flg = SEM_UNDO;

if ( -1 == semop( semid, &vbuf, 1))

printf( "v()-semop() 실행 오류\n");

}

void *fun_thread1(void *arg)

{

while( 1)

{

p();

printf( "thread1 실행\n");

if ( 5 < cnt)

{

printf( "thread1 완전 종료\n");

v();

break;

}

else

{

cnt++;

usleep( 100);

printf( "thread1 완료\n");

}

v();

}

return NULL;

}

void *fun_thread2(void *arg)

{

while( 1)

{

p();

printf( "thread2 실행\n");

if ( 5 < cnt)

{

printf( "thread2 완전 종료\n");

v();

break;

}

else

{

printf( "카운터= %d\n", cnt);

usleep( 100);

printf( "thread2 완료\n");

}

v();

}

return NULL;

}

int main(int argc, char *argv[])

{

pthread_t thread1;

pthread_t thread2;

union semun{

int val;

struct semid_ds *buf;

unsigned short int *arrary;

} arg;

if ( -1 == (semid = semget( IPC_PRIVATE, 1, IPC_CREAT | 0666)))

{

printf( "semget() 실행 오류\n");

return -1;

}

arg.val = 1; // 세마포어 값을 1로 설정

if ( -1 == semctl(semid, 0, SETVAL, arg))

{

printf( "semctl()-SETVAL 실행 오류\n");

return -1;

}

pthread_create(&thread1, NULL, fun_thread1, NULL);

pthread_create(&thread2, NULL, fun_thread2, NULL);

pthread_join( thread1, NULL);

pthread_join( thread2, NULL);

if ( -1 == semctl(semid, 0, IPC_RMID, arg))

{

printf( "semctl()-IPC_RMID 실행 오류\n");

return -1;

}

printf( "프로그램 종료\n");

return 0;

}

]$ gcc main.c -lpthread // 소스에 쓰레드를 이용하므로 옵션에 -lpthread를 추가

]$ ./a.out

thread1 실행

thread1 완료

thread2 실행

카운터= 1

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 2

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 3

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 4

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 5

thread2 완료

thread1 실행

thread1 완료

thread2 실행

thread2 완전 종료

thread1 실행

thread1 완전 종료

프로그램 종료

]$

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#include <windows.h>

#include <stdio.h>

#if(0)

gcc -Wall -DTEST_PRINTF -c win12.c

gcc -o win12 win12.o -lm -lws2_32 -lgdi32

#endif

void gotoxy(int x, int y) // 좌표 보내기 gotoxy

{

COORD Cur;

Cur.X=x;

Cur.Y=y;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),Cur);

}

void cursor(int n) // 커서 보이기 & 숨기기

{

HANDLE hConsole;

CONSOLE_CURSOR_INFO ConsoleCursor;

hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

ConsoleCursor.bVisible = n;

ConsoleCursor.dwSize = 1;

SetConsoleCursorInfo(hConsole , &ConsoleCursor);

}

int main(void)

{

POINT pt; // 마우스 포인터

int x[50000]; // 매크로 x좌표

int y[50000]; // 매크로 y좌표

int sub_x[50000], sub_y[50000]; // 보조 xy

int check_mouse = 2; // 마우스 관련 변수

int i = 0; // 매크로 녹화시 이용

int n = 0; // 메크로 진행시 이용

system("mode con: cols=31 lines=13"); // 화면 고정

cursor(0); // 커서 숨기기

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓"); // puts함수는 자동으로 줄바꿈 처리를 한다.

puts("┃　　　　　　　　　　　　　┃");

puts("┃ 　　 Mouse Macro　　　　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　　F7 : 매크로 정지　　　┃");

puts("┃　　F8 : 매크로 시작　　　┃");

puts("┃　 F10 : 종료하기 　　　┃");

puts("┃　 F11 : 상세 도움말 　　 ┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┗━━━━━━━━━━━━━┛");

while(1)

{

if(GetKeyState(VK_F10) < 0) // F10키 누르면

{

return 0; // 프로그램 종료

}

else if(GetKeyState(VK_F11) < 0 ) // F11키 누르면

{

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃ >>처음부터 녹화를 시작　┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　>>계속 이어서 녹화 　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　 녹화 뒤 매크로 정지 후 ┃");

puts("┃　 매크로 시작을 누르면 ┃");

puts("┃　 매크로가 진행됩니다. 　┃");

puts("┃ (마우스 매크로만 가능) ┃");

puts("┃　　　Esc : 돌아가기　　　┃");

puts("┗━━━━━━━━━━━━━┛");

while(1)

{

if(GetKeyState(27) < 0) // Esc키 누르면

{

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓");

puts("┃　　　　　　　　　　　　　┃");

puts("┃ 　　 Mouse Macro　　　　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　　F7 : 매크로 정지　　　┃");

puts("┃　　F8 : 매크로 시작　　　┃");

puts("┃　 F10 : 종료하기 　　　┃");

puts("┃　 F11 : 상세 도움말 　　 ┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┗━━━━━━━━━━━━━┛");

break; // while문 탈출

}

else if(GetKeyState(VK_F5) < 0 ) // 처음부터 다시 매크로 설정

{

for(i = 0 ; i <= 50000 ; i ++)

{

x[i] = -858993460; y[i] = -858993460; // 초기화 과정

sub_x[i] = -858993460; sub_y[i] = -858993460;

// 이때 모든 값은 모니터 해상도에 따라 마우스 좌표값이

// 될 수 있어서 쓰레기값인 -858993460을 이용했다.

// 추천하는 방법은 아니다.

}

i = 0;

while(1)

{

GetCursorPos(&pt); // 마우스 좌표값들 받아옴

x[i] = pt.x; // x좌표값 저장

y[i] = pt.y; // y좌표값 저장

sub_x[i] = 0, sub_y[i] = 0; // 왼쪽버튼 누르고 떼는 모습 저장하는 곳

i++; // i는 프레임을 의미

Sleep(10); // 0.01초 마다 1프레임 찍힘

if(GetKeyState(VK_LBUTTON) < 0 && check_mouse >= 1) // 왼쪽버튼 눌렀을 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 5000;

y[i] = 5000;

check_mouse = 0;

i++;

}

else if(GetKeyState(VK_LBUTTON) >= 0 && check_mouse == 0) // 왼쪽버튼 뗄 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 6000;

y[i] = 6000;

check_mouse = 1;

i++;

}

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

else if(GetKeyState(VK_F6) < 0 ) // 이어서 매크로 설정

{

while(1)

{

GetCursorPos(&pt);

x[i] = pt.x;

y[i] = pt.y;

sub_x[i] = 0, sub_y[i] = 0;

i++;

Sleep(10);

if(GetKeyState(VK_LBUTTON) < 0 && check_mouse >= 1) // 왼쪽버튼 눌렀을 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 5000;

y[i] = 5000;

check_mouse = 0;

i++;

}

else if(GetKeyState(VK_LBUTTON) >= 0 && check_mouse == 0) // 왼쪽버튼 뗄 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 6000;

y[i] = 6000;

check_mouse = 1;

i++;

}

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

else if(GetKeyState(VK_F8) < 0 ) // 매크로 재생

{

n = 0; // 프레임 처음으로 돌아가서 재생하기 위한 n

while(1)

{

if(x[n] == 5000) // 왼쪽버튼 눌러지는 것을 5000이라고 가정

{

mouse_event(MOUSEEVENTF_LEFTDOWN, sub_x[n], sub_y[n], 0, 0); // 좌표에 맞게 왼쪽버튼 누르기

Sleep(1);

}

else if(x[n] == 6000) // 왼쪽버튼 떼지는 것을 6000이라고 가정

{

mouse_event(MOUSEEVENTF_LEFTUP, sub_x[n], sub_y[n], 0, 0); // 좌표에 맞게 왼쪽버튼 떼기

Sleep(1);

}

if(x[n] == -858993460) // 쓰레기값 만나면 처리되는 작동

{

n = 0; // 즉, 매크로의 끝부분으로 가면 다시 n = 0 으로 하여 다시 처음부터 시작

}

SetCursorPos(x[n],y[n]); // 지정한 곳의 좌표로 마우스 이동

Sleep(10);

n++;

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

Sleep(10);

}

return 0;

}

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