#include <iostream> 
  #include <conio.h> 
   
   using namespace std; 
  void hexfunc(double); 
   
  int main() 
  {double result; 
      int num1,num2; 
      int choice; 
  char base; 
   
   
  cout<<"Enter the base that you want ,hexademical(h) or octademical(o)\n"; 
  cin>>base; 
   
    //base hexademical 
    if(base=='h') 
    {cout<<"Enter first integer in that base\n"; 
    cin>>hex>>num1; 
    cout<<"Enter second integer in that base\n"; 
    cin>>hex>>num2; 
   cout<<num1<<"  "<<num2<<endl; 
   //now our x value in 10 base 
   //işlemler 
   cout<<"Please choose an option by entering the number\n"; 
      cout<<"1 - Addition\n"; 
      cout<<"2 - Subtraction\n"; 
      cout<<"3 - Division\n"; 
      cout<<"4 - Multiplication\n"; 
      cin>>choice; 
   if(choice=1) 
   { 
          result=num1+num2; 
        //conversion hex to demical 
        hexfunc(result); 
   
              } 
      //subtraction 
   
  if(choice=2) 
  {result=num1-num2; 
   
  hexfunc(result);} 
  //devided 
  if(choice=3) 
  {result=num1/num2; 
   
  hexfunc(result); 
      }//mult 
  if(choice=4) 
  {result=num1*num2; 
  hexfunc(result); 
      } 
  }return 0; 
  } 
   
  //my myfunc. 
   
  void hexfunc(double result_par) 
  {int remainder; 
   
  while (result_par>=1) 
  {             remainder=static_cast<int>(result_par)%16; 
                if (remainder>9) 
  { 
           if(    remainder==10   ) 
               cout<<"A"; 
           if (  remainder==11  ) 
               cout<<"B"; 
           if(   remainder==12   ) 
               cout<<"C"; 
           if (  remainder==13  ) 
                cout<<"D"; 
           if(   remainder==14   ) 
               cout<<"E"; 
           if(remainder==15   ) 
                cout<<"F";   } 
   
   
           else if(remainder<=9) { 
         cout<<remainder; 
        } 
                    result_par=result_par/16; 
                    if (result_par==0)break; 
         }}