1.

#include<iostream>
using namespace std;
class Complex
{
	public:
		Complex(double r,double i):real(r),imag(i){}
		Complex operator +(Complex &s);
		void display();
	private:
		double real;
		double imag;
};
Complex Complex:: operator +(Complex &s)
{
	return(Complex(real+s.real,imag+s.imag));
}
void Complex::display()
{
	cout<<real<<"+"<<imag<<"i"<<endl;
}
int main()
{
	Complex c1(4.0,2.0),c2(1.0,1.0);
	Complex c3=c1+c2;
	c3.display();
}