C++ program to create a simple calculator

#include <iostream>
using namespace std;
class Calculator
{
private:
float val;
public:
void getData()
{
cout<<"Enter a number...\n";
cin>>val;
}
void showData()
{
cout<<val<<endl;
}
Calculator operator+(Calculator arg2);
Calculator operator-(Calculator arg2);
Calculator operator*(Calculator arg2);
Calculator operator/(Calculator arg2);
};
Calculator Calculator::operator+(Calculator arg2)
{
Calculator temp;
temp.val=val+arg2.val;
return temp;
}
Calculator Calculator::operator-(Calculator arg2)
{
Calculator temp;
temp.val=val-arg2.val;
return temp;
}
Calculator Calculator::operator*(Calculator arg2)
{
Calculator temp;
temp.val=val*arg2.val;
return temp;
}
Calculator Calculator::operator/(Calculator arg2)
{
Calculator temp;
temp.val=val/arg2.val;
return temp;
}
int main()
{
Calculator obj1,obj2,obj3;
int choice;
obj1.getData();
cout<<"1st value entered....\n";
obj1.showData();
obj2.getData();
cout<<"2nd value entered....\n";
obj2.showData();
cout<<"Input choice\n1.+\n2.-\n3.*\n4./\n";
cin>>choice;
switch(choice)
{
case 1:obj3=obj1+obj2;
break;
case 2:obj3=obj1-obj2;
break;
case 3:obj3=obj1*obj2;
break;
case 4:obj3=obj1/obj2;
break;
default:
cout<<"Invalid choice\n";
}
cout<<"Result...\n";
obj3.showData();
return 0;
}