通过函数来实现复数相加

#include <iostream>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
class Complex
{
    public:
        Complex(){real=0;imag=0;}
        Complex(double r,double i){real=r;imag=i;}
        Complex complex_add(Complex &c2);
        void display();
    private:
        double real;
        double imag;
};

Complex Complex::complex_add(Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}

void Complex ::display()
{
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main(int argc, char** argv) {
    Complex c1(3,4),c2(5,-10),c3;
    c3=c1.complex_add(c2);
    cout<<"c1=";c1.display();
    cout<<"c2=";c2.display();
    cout<<"c1+c2=";c3.display();
    return 0;
}