【C】制作简单的时钟减法程序

#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=;
    pTmp=strtok(str, DELIMS);
    ulTmp=strlen(pTmp);
    if (ulTmp>=H_AND_M_NUM)
    {
        printf("Error arg: %s\n", str);
        return -;
    }
    memcpy(h, pTmp, ulTmp);

    pTmp=strtok(NULL, DELIMS);
    ulTmp=strlen(pTmp);
    if (ulTmp>=H_AND_M_NUM)
    {
        printf("Error arg: %s\n", str);
        return -;
    }
    memcpy(m, pTmp, ulTmp);
    return ;
}

/* 只支持24小时以内的时钟减法 */
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=;
    unsigned int ulEndTimeM=;
    int BeginLen=;
    int EndLen=;
    if ( == strcmp("-h", argv[]))
    {
        printf("Useage: calcTime BeginTime EndTime \n""e.g. calcTime 18:58 19:59\n");
        return ;
    }

    if (ARGC_NUM != argc)
    {
        printf("Error! argc=%d\n", argc);
        return -;
    }
    BeginLen=strlen(argv[]);
    EndLen=strlen(argv[]);

    if ((BeginLen>=MAX_STR_NUM) || (EndLen>=MAX_STR_NUM))
    {
        printf("Error len! argv[1]=%s, argv[2]=%s\n", argv[], argv[]);
        return -;
    }

    memcpy(strBegin, argv[], BeginLen);
    memcpy(strEnd, argv[], EndLen);

    if (( != findH_M(strBegin, BeginH, BeginM)) || ( != findH_M(strEnd, EndH, EndM)))
    {
        return -;
    }
    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\n", (ulEndTimeM-ulBeginTimeM)/M_2_S,(ulEndTimeM-ulBeginTimeM)%M_2_S);
    return ;
}

使用方法：

X:\gcc>calcTime -h
Useage: calcTime BeginTime EndTime
e.g. calcTime 18:58 19:59

X:\gcc> calcTime 18:58 19:59
Congratulations! End-Begin is 1:1