C语言算时间差

//计算时间差

#include<stdio.h>

int main()
{
    printf("请输入两个时间，以 04 30的格式输入: ");
    int hour1,hour2,minute1,minute2;
    int sumMinute1,sumMinute2,timeSub;
    
    scanf("%d %d",&hour1,&minute1);
    scanf("%d %d",&hour2,&minute2);
    sumMinute1 = hour1*60 + minute1;
    sumMinute2 = hour2*60 + minute2;
    timeSub = sumMinute2 - sumMinute1;
    
    printf("时间差是%d小时%d分钟",timeSub/60,timeSub%60);
    return 0;
 }