HOJ ( acm.hdu.edu.cn ) 1170

#include <iostream>
#define CB(a) cout<<(a);break
#define CA(a) case a:
#define C(a,b) CA(a)CB(b)
using namespace std;
int main(){
   int N;
   for(cin>>N;N--;cout<<endl){
       char c;
       int a,b;
       cin>>c>>a>>b;
       switch(c){
           C('+',a+b);
           C('-',a-b);
           C('*',a*b);
           CA('/')
               if(a%b==0){CB(a/b);}
               else{
                   cout.precision(2);
                   cout<<fixed<<double(a)/double(b);break;
               }
       }
   }
   return 0;
}