代码如下：

#include <bits/stdc++.h>
using namespace std;

int main() {
	int k, h=0, j, m=0, s=0;
	cin >> h >> m >> s >> k;
	h += k / 3600;
	m += k / 60;
	s += k % 60;
	if (s >= 60) {
		m += s / 60;
		s %= 60;
	}
	if (m >= 60) {
		h += m / 60;
		m %= 60;
	}
	if (h >= 24) {
		j = h % 24;
		h = 0;
		h += j;
	}
	cout << h << " " << m << " " << s ;
	return 0;
}

到底哪里出错了啊啊啊！