# include<stdio.h>
int main()
{
int hour1, minute1;
int hour2, minute2;
printf("請輸入第一個時間:");
scanf("%d %d", &hour1, &minute1);
printf("請輸入第二個時間:");
scanf("%d %d", &hour2, &minute2);
int ih = hour2 - hour1;
int im = minute2 - minute1;
if(im<0){
im+=60;
ih--;
}
printf("兩個時間差爲%d小時%d分鐘。", ih, im);
return 0;
}