C语言程序：计算时间加秒后的结果

#include <stdio.h>

int main() { int hour, minute, second, n; scanf("%d:%d:%d", &hour, &minute, &second); scanf("%d", &n); second += n; minute += second / 60; second %= 60; hour += minute / 60; minute %= 60; hour %= 24; printf("%02d:%02d:%02d", hour, minute, second); return 0; }