C :

#include "stdio.h"
#include "math.h"
int main() {
    /*
     * 将两个时间转换成以分表示
     * 计算以分表示的时间差
     * 然后将差再转换成小时分的形式
     */
    int hour1, minute1, hour2, minute2;
    //printf("Input time one(hour, minute):");
    scanf("%d,%d", &hour1, &minute1);
    //printf("Input time two(hour, minute):");
    scanf("%d,%d", &hour2, &minute2);
    // 将两个时间转换成以分表示
    int m1 = hour1 * 60 + minute1;
    int m2 = hour2 * 60 + minute2;
 
    int d = fabs(m1 - m2);
 
    int hour = d / 60;
    int minute = d % 60;
    printf("%d hour %d minute\n", hour, minute);
 
}