Program to add two complex numbers using friend functions

// program to add two complex numbers
//using friend function
#include

using namespace std;

// defination of class Complex
class Complex
{
	private:
		float real;
		float imag;
	public:
		//default constructor to initialize
		Complex(){
			real = 0;
			imag = 0;
		}
		// parameterized constructor
		Complex(float r, float i){
			real = r;
			imag = i;
		}
		//friend function declaration to add complex number
		friend Complex add(Complex c1, Complex c2); 
		// function to display
		void display(){
			cout<<"("<<real<<","<<imag<<")"<<endl;
		}
};

// friend function defination
Complex add(Complex c1, Complex c2){
	//create temporary object and return it
	Complex temp;
	temp.real = c1.real + c2.real;
	temp.imag = c1.imag + c2.imag;
	return temp;
}
int main(){
	Complex c1(2.3, 4.4), c2(3.3, 4.5), c3;
	c3 = add(c1, c2);//adds c1 with c2 and returns to c3
	c1.display();
	c2.display();
	cout<<"And the sum is :"<<endl;
	c3.display();
	return 0;
}

Sample Run:

(2.3,4.4)
(3.3,4.5)
And the sum is :
(5.6,8.9)