计算火车运行时间

https://pintia.cn/problem-sets/13/problems/403

 1 #include <stdio.h>
 2 int main(void)
 3 {
 4     int start_time, end_time;
 5     int start_minutes, end_minutes;
 6     int hours, minutes;
 7 
 8     scanf("%d %d", &start_time, &end_time);
 9     start_minutes = start_time / 100 * 60 + start_time % 100;
10     end_minutes = end_time / 100 * 60 + end_time % 100;
11     hours = (end_minutes - start_minutes) / 60;
12     minutes = (end_minutes - start_minutes) % 60;
13 
14     printf("%02d:%02d
", hours, minutes);
15 
16     return 0;
17 }