编辑代码

#include <stdio.h>
int main () {
   int hour1,minute1;
   int hour2,minute2;
   scanf("%d %d",&hour1,&minute1);
   scanf("%d %d",&hour2,&minute2);

    int ih=hour2-hour1;
    int im=minute2-minute1;
    if(im<0){
        im=60+im;
        ih--;
    } 

    printf("时间差是%d小时%d分钟\n",ih,im);
    return 0;
}