simple program using friend function (OOP) (55)

#include<iostream>

using namespace std;

class calculator

{

private:

int num1,num2;

public:

calculator(int x,int y)

{

num1=x;

num2=y;

}

friend int add(calculator);

friend int subtraction(calculator);

friend int division(calculator);

friend float mean(calculator);

};

int add(calculator objc)

{

return objc.num1+objc.num2;

}

int subtraction(calculator objs)

{

return objs.num1-objs.num2;

}

int division(calculator objd)

{

return objd.num1/objd.num2;

}

float mean(calculator objm)

{

return objm.num1+objm.num2/2;

}

int main()

{

int a,b;

cout<<"please enter the first number:";

cin>>a;

cout<<"please enter the second number:";

cin>>b;

calculator obj(a,b);

cout<<"the addition of two number is:"<<add(obj)<<endl;

cout<<endl;

cout<<"the subtraction of two number is:"<<subtraction(obj)<<endl;

cout<<endl;

cout<<"the division of two number is:"<<division(obj)<<endl;

cout<<endl;

cout<<"the mean of two number is:"<<mean(obj)<<endl;

}