[C] 간단 한 시계 감법 프로그램 만 들 기

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define ARGC_NUM 3

#define MAX_STR_NUM 6

#define H_AND_M_NUM 3

#define DELIMS ":"

#define M_2_S 60

#define D_2_H 24*M_2_S

int findH_M(char*str, char*h, char*m)

{    

    char* pTmp=NULL;

    int ulTmp=0;

    pTmp=strtok(str, DELIMS);

    ulTmp=strlen(pTmp);

    if (ulTmp>=H_AND_M_NUM)

    {

        printf("Error arg: %s
", str);

        return -1;

    }

    memcpy(h, pTmp, ulTmp);

    

    pTmp=strtok(NULL, DELIMS);    

    ulTmp=strlen(pTmp);

    if (ulTmp>=H_AND_M_NUM)

    {

        printf("Error arg: %s
", str);

        return -1;

    }

    memcpy(m, pTmp, ulTmp);

    return 0;

}



/*    24          */

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

{

    char strBegin[MAX_STR_NUM]="";

    char strEnd[MAX_STR_NUM]="";

    char BeginH[H_AND_M_NUM]="";

    char BeginM[H_AND_M_NUM]="";

    char EndH[H_AND_M_NUM]="";

    char EndM[H_AND_M_NUM]="";

    unsigned int ulBeginTimeM=0;

    unsigned int ulEndTimeM=0;

    int BeginLen=0;

    int EndLen=0;

    if (0 == strcmp("-h", argv[1]))

    {

        printf("Useage: calcTime BeginTime EndTime 
""e.g. calcTime 18:58 19:59
");

        return 0;

    }

    

    if (ARGC_NUM != argc)

    {

        printf("Error! argc=%d
", argc);

        return -1;

    }

    BeginLen=strlen(argv[1]);

    EndLen=strlen(argv[2]);

    

    if ((BeginLen>=MAX_STR_NUM) || (EndLen>=MAX_STR_NUM))

    {

        printf("Error len! argv[1]=%s, argv[2]=%s
", argv[1], argv[2]);

        return -1;

    }

    

    memcpy(strBegin, argv[1], BeginLen);

    memcpy(strEnd, argv[2], EndLen);

    

    if ((0 != findH_M(strBegin, BeginH, BeginM)) || (0 != findH_M(strEnd, EndH, EndM)))

    {

        return -1;

    }

    ulBeginTimeM=atoi(BeginH)*M_2_S+atoi(BeginM);

    ulEndTimeM=atoi(EndH)*M_2_S+atoi(EndM);

    ulEndTimeM=(ulEndTimeM>ulBeginTimeM)?(ulEndTimeM):(ulEndTimeM+D_2_H);

    printf("Congratulations! End-Begin is %d:%d
", (ulEndTimeM-ulBeginTimeM)/M_2_S,(ulEndTimeM-ulBeginTimeM)%M_2_S);

    return 0;

}