hdu 4493 Tutor(简单处理题)

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#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int main()

{

    double
n,m,sum;

    int
i,j,t;

    scanf("%d",&t);

    while(t--)

        {

            sum=0.0;

            for(i=0;i<12;i++)

                {

                    scanf("%lf",&n);

                    sum+=n;

                }//printf("%lf^",sum);

            sum/=12.0;

            //sum+=0.005;

            int
data;

            data=(int)((sum+0.005)*100);

            int
a,b,c;

            a=(data%10);

            b=(data/10%10);//printf("%d%d^",a,b);

            if(a==0&&b==0)

                printf("$%d\n",(int
)sum);

            else
if(a==0)

                printf("$%.1lf\n",sum);

            else
printf("$%.2lf\n",sum);

        }

    return
0;

}