#include<iostream>
#include<conio.h>

using namespace std;

class NewCalculator{

private:

double sum , n1, n2;

public:

NewCalculator():sum(0),n1(0),n2(0){}

void menu();

double getsum();

void setdata();

void operator +();

void operator -();

void operator *();

void operator /();

};

void NewCalculator::menu(){

cout<<"Plese select operation(enter 1 - 4): "<<endl<<"1. Division"<<endl;
cout<<"2. Multlipication"<<endl<<"3. Substraction"<<endl<<"4. Addition"<<endl;
}

void NewCalculator::setdata(){

 cout<<"Please enter first number: " <<endl;
 cin>>n1;
 cout<<"Please second first number: " <<endl;
 cin>>n2;

}


void NewCalculator::operator +(){

 sum = n1 / n2;
}

void NewCalculator::operator -(){

 sum = n1 * n2;
}


void NewCalculator::operator *(){

 sum = n1 - n2;
}


void NewCalculator::operator /(){

 sum = n1 + n2;

}

double NewCalculator::getsum(){

 return sum;
}



void main(){

NewCalculator obj;

int c;


obj.setdata();

l1:
obj.menu();
cin>>c;

switch(c){

case 1 :{
 +obj;
 break;
   }

case 2:{
 -obj;
 break;
   }

case 3:{
 *obj;
 break;
   }

 
case 4:{
 -obj;
 break;
   }

default:{
 cout<<"Please choose between 1 to 4!"<<endl;
 system("pause");
 system("cls");
 goto l1;
  }
}




cout<<obj.getsum();
getch();

}