C语言的输入与输出

#include <stdio.h>

int get_time()
{
    int h1, m1, s1, h2, m2, s2;
    scanf("%d:%d:%d %d:%d:%d", &h1, &m1, &s1, &h2, &m2, &s2);
    int day = 0;
    if ((getchar()) != '\n') scanf("(+%d)", &day);
    int f = h1 * 3600 + m1 * 60 + s1;
    int s = h2 * 3600 + m2 * 60 + s2;
    return s - f + day * 24 * 3600;
}

int main()
{
    int n;
    scanf("%d", &n);

    while (n --)
    {
        int ans = (get_time() + get_time()) / 2;
        printf("%02d:%02d:%02d\n", ans / 3600, ans / 60 % 60, ans % 60);
    }

    return 0;
}