like this

----->>{long long int n=0,a,b,c;
 for(n;cin>>n;n--){
 while(cin>>a>>b>>c)
 {if(a>=1&&a<=4){
 if(a==1){
 cout<<b+c<<endl;}
 else if(a==2){
 cout<<b-c<<endl;}
 else if(a==3){
 cout<<b*c<<endl;}
 else if(a==4){
 cout<<b/c<<endl;}}}}}