demo_operator_02_b.cpp

对于一个初涉VC＋＋的人来书

//************************************************
// 通过运算符重载实现复数类加法－类友元函数
//************************************************

# include <iostream.h>

class Complex
{
public:
	Complex() { real=0;imag=0; }
    Complex(double r) { real=r;imag=0; }
    Complex(double r,double i) { real=r;imag=i; }
    friend Complex operator + (Complex &c1,Complex &c2);
    void display();
private:
    double real;
    double imag;
};

Complex operator + (Complex &c1,Complex &c2)
{
	return Complex(c1.real+c2.real, c1.imag+c2.imag);
}
   
void Complex::display()
{
	cout<<"("<<real<<","<<imag<<")"<<endl;
}

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();

	return 0;
}