#include <stdio.h>
#include <stdlib.h>
#pragma warning (disable:4996)

int main(void){
 int distance, speed, hour, min;
 double sec,time;
 
 printf("거리와 속력 입력 : ");
 scanf("%d%d", &distance, &speed);
 time = distance / (double)speed;
 hour = (int)time;
 time -= hour;
 time *= 60;
 min = (int)time;
 time -= min;
 time *= 60;
 sec = time;
 printf("소요 시간은 %d시간 %d분 %.3lf초입니다.", hour, min, sec);
 system("pause");
 return 0;
}


이정도면 효율적이냐