Answer to Question #181354 in C++ for sandeep

Question

. Write a program to overload binary – (minus) operator for Number class using friend function. Number class have two data members as num1 and num2.

Answer 1

#include <iostream>
class Number
{
public:
	void setNumber(float n, float m)
	{
		num_1 = n;
		num_2 = m;
	}
	void viewNumber() 
	{
		std::cout << "num_1=" << num_1 << std::endl;
		std::cout << "num_2=" << num_2 << std::endl;
	}
	friend Number operator - (const Number &n1, const Number &n2);
	Number(){};
	Number(float n, float m) 
	{
		num_1 = n;
		num_2 = m;
	}
private:
	double num_1{ 0 };
	double num_2{ 0 };
};


Number operator - (const Number& n1, const Number& n2) 
{
	return Number(n1.num_1 - n2.num_1, n1.num_2 - n2.num_2);
}
int main()
{
    //test work
	Number t1(25, 64);
	Number t2(47, 21);
	Number t3;
	//before
	t3.viewNumber();
	t3 = t1 - t2;
	//after
	t3.viewNumber();
    return 0;
}