某一时间的下一秒

20 59 59 ---> 21:00:00

20 59 58 ---> 20:59:59

 

#include <stdio.h>
int main()
{
    int h, m, s;
    scanf("%d%d%d", &h, &m, &s);
    if(h > 23 || m > 59 || s > 59)
    {
        printf("input error\n");
    }
    else
    {
        s = s + 1;
        if(s == 60)
        {
            s = 0;
            m = m + 1;
            if(m == 60)
            {
                m = 0;
                h = h + 1;
                if(h == 24)
                    h = 0;
            }
        }
        printf("%02d:%02d:%02d\n", h, m, s);    //2 输出占2个字符， 0不足2个字符补0
    }
}