C++程序习题-运算符重载[4.1]

    定义一个复数类Complex,重载运算符“+”，使之能用于复数的加法运算。将运算符函数重载为非成员，非友元的普通函数。编写程序，求两个复数的之和。

#include <iostream>
using namespace std;

//复数类

class Complex
{
      public:
      Complex(){real = 0;imag = 0;}
      Complex(double r,double i){real = r;imag = i;}
      void display();
      Complex operator +(Complex &c2);
      
      private:
      double real;
      double imag;
};

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

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

int main()
{
    Complex c1(3,4),c2(5,-10),c3;
    c3 = c1 + c2;
    cout << "c1=";c1.display();
    cout << "c2=";c2.display();
    cout << "c1 + c2 ="; c3.display();
    
    system("pause");
    return 0;
}