OOP-1-complex.cpp

#include <iostream>
using namespace std;
class complex
{
	int x, y;

public:
	complex()
	{
		x = 0;
		y = 0;
	}
	friend void operator>>(complex &u, complex &v)
	{
		cout << "Please enter the real value for first no. (x1) =>" << endl;
		cin >> u.x;
		cout << "Enter the imaginary value of the first no. (y1)" << endl;
		cin >> u.y;
		cout << "Please enter the real value for second no. (x2) =>" << endl;
		cin >> v.x;
		cout << "Enter the imaginary value of the second no. (y2)" << endl;
		cin >> v.y;
	}

	friend void operator<<(complex &u, complex &v)
	{
		cout << "First complex no is =>" << u.x << "+" << u.y << "i" << endl;
		cout << "second complex no is =>" << v.x << "+" << v.y << "i" << endl;
	}

	friend void operator+(complex &u, complex &v)
	{
		complex add;
		add.x = u.x + v.x;
		add.y = u.y + v.y;
		if (add.y > 0)
			cout << "addition  of the given complex nos. is =>" << add.x << "+" << add.y << "i" << endl;
		else
			cout << "addition  of the given complex nos. is =>" << add.x << "-i" << add.y << endl;
	}

	friend void operator-(complex &u, complex &v)
	{
		complex sub;
		sub.x = u.x - v.x;
		sub.y = u.y - v.y;
		if (sub.y > 0)
			cout << "substraction  of the given complex nos. is =>" << sub.x << "+" << sub.y << "i" << endl;
		else
			cout << "substraction  of the given complex nos. is =>" << sub.x << (-1) * sub.y << "-i" << endl;
	}

	friend void operator*(complex &u, complex &v)
	{
		complex mul;
		mul.x = (u.x * v.x) - (u.y * v.y);
		mul.y = (u.x * v.y) + (v.x * u.y);
		if (mul.y > 0)
			cout << "Multiplication  of the given complex nos. is =>  " << mul.x << "+" << mul.y << "i" << endl;
		else
			cout << "Multiplication  of the given complex nos. is =>  " << mul.x << (-1) * mul.y << "-i" << endl;
	}
};

int main()
{
	char ch;
	char des;
	complex s1, s2;
	operator>>(s1, s2);
	operator<<(s1, s2);
	do
	{
		cout << "Choose the operation to be performed=> " << endl;
		cout << "(+)addition" << endl;
		cout << "(-)subtraction" << endl;
		cout << "(*)Multiplication" << endl;
		cin >> ch;
		switch (ch)
		{
		case '+':
			s1 + s2;
			break;
		case '-':
			s1 - s2;
			break;
		case '*':
			s1 *s2;
			break;
		default:
			cout << "Invalid Operation" << endl;
		}
		cout << "Do you Wish To Perform Operation Again ? => (Y/N)";
		cin >> des; 
	} while (des == 'y' || des == 'Y');
}