hdu 1170(Balloon Comes!)

#include<stdio.h>
#include<math.h>
#define zero 1e-10
int main()
{
    int _case;
    char ys;
    int a,b,c;
    double d;
    while(scanf("%d",&_case))
    {
        while(_case--)
        {
            getchar();
            scanf("%c %d %d",&ys,&a,&b);
            if(ys=='+')printf("%d\n",a+b);
                else if(ys=='-')printf("%d\n",a-b);
                    else if(ys=='*')printf("%d\n",a*b);
                        else if(ys=='/')
                        {
                            d=(double)a/b;
                            c=d;
                            if(sqrt(d-c)>zero)printf("%.2lf\n",d);
                            else printf("%d\n",c);
                        }
        }

    }
        return 0;
}