poj2840

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
int main()
{
    int n,len;
    char str[10];
    scanf("%d",&n);
    while(n--)
    {
        int tmp;
        scanf("%s",str);
        len=strlen(str);
        tmp = str[len-1] - '0'+str[len-2] - '0';
        if(tmp != 0)
        {
            printf("0\n");
            continue;
        }
        else
        {
            if(len == 4)
                tmp = str[len-4]-'0';
            else
                tmp = str[len-4] - '0' + (str[len-5] - '0')*10;
            if(tmp <= 12)
                printf("%d\n",tmp+12);
            else
                printf("%d\n",tmp-12);
        }
    }
    return 0;
}

//2840
#include<stdio.h>
main()
{
    int t,a,b;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d:%d",&a,&b);
        b?puts("0"):printf("%d\n",a>12?a-12:a+12);
    }
}

一开始的想法是因为输入的??:??所以以为只能把他作为串来放进数组，可是大神用了13行就写出来了，scanf("%d:%d",&h,&m)