HDU 3953题解 看到标题后才知道自己上当了，他妹的！哎，还是经验不足啊！

#include<stdio.h>
#include<string.h>
#define N 101

int main()
{
    int ncases, i, sum1, sum2;
    int len1, len2, j;
    char a[N], b[N];
    
    while(scanf("%d",&ncases) != EOF)
    {
        for (i=1; i<=ncases; i++)
        {
            scanf("%s%s",a,b);
            len1 = strlen(a);
            len2 = strlen(b);
            sum1 = 0;
            sum2 = 0;
            printf("Case %d: ",i);
            for(j=0; j<len1; j++)
            {
               a[j] = a[j]-'0';
               sum1 = sum1 + a[j];
            }
            for(j=0; j<len2; j++)
            {
                b[j] = b[j]-'0';
                sum2 = sum2 + b[j];
            }
            printf("%d\n",sum1+sum2);
        }  
    }
    return 0;
}