杭电ACM2061--Treasure the new start, freshmen!

http://acm.hdu.edu.cn/showproblem.php?pid=2061

这题很简单。注意换行。

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#include <stdlib.h>
#include <stdio.h>
int main()
{
    int s,t,i;
    char a[];
    double x,y;
    double m,n;
    bool f;
    double z;
    scanf("%d",&s);
    while (s--)
    {
        f = true;
        m = ;n = ;
        scanf("%d",&t);
        for (i=;i<t;i++)
        {
            scanf("%s%lf%lf",a,&x,&y);
            if (y<)
                f = false;
            m = m+x;
            n = n+y*x;
        }
        z = n/m;
        if (f)
            printf("%.2lf\n",z);
        else
            printf("Sorry!\n");
        if (s)
            printf("\n");
    }
    return ;
}
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