C：计算时间差;

#include <stdio.h>

int main(){
  int hour1,minute1;
  int hour2, minute2;
  scanf("%d %d",&hour1,&minute1);
  scanf("%d %d",&hour2,&minute2);

  int t1=hour1*60+minute1;
  int t2=hour2*60+minute2;
  int t=t2-t1;
  printf("The time different is %d %d",t/60,t/60);

  return 0;
}