运算符重载 + 两个复数相加

#include 

using namespace std;

class Complex

{

public:

Complex(double r=0,double i=0):real(r),imag(i){}

void input(){cin>>real>>imag;}

void display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}

double real;

double imag;

};

int main()

{

Complex operator+(Complex c1,Complex c2);

Complex c1,c2,c3;

c1.input();

c2.input();

    c3=c1+c2;

c3.display();

  return 0;

}

Complex operator+(Complex c1,Complex c2)

{

Complex c;

c.real=c1.real+c2.real;

c.imag=c1.imag+c2.imag;

return c;

}