【无标题】运算符重载 实现复数的乘除

class complex{
	private :
	double real;
	double img;
	public:
	complex(){real =0; img=0; }//定义构造函数
	complex(double r,double i){real=r; img=i; }//构造函数重载
	complex operator * (complex & c2);//声明重载运算符'*'函数
	complex operator / (complex & c2);//声明重载运算符'/'函数
	void display();//输出函数
};
//定义重载运算符'*'函数
complex complex :: operator * (complex &c2)
{
	complex c;
	c.real=real * c2.real -img * c2.img;
	c.img=real * c2.img + c2.real * img;
	return c;
}
//声明重载运算符'/'函数
complex complex :: operator /(complex &c2)
{
	complex c;
	c.real=(real*c2.real-img*c2.img) /(c2.real*c2.real+c2.img*c2.img);
	c.img=(img*c2.real - real * c2.img) /(c2.real*c2.real+c2.img*c2.img);
	return c;
}
void complex :: display()
{
	cout<<"("<< real<<","<<img<<"i )"<< endl;
}
int main()
{
    complex c1(2,4), c2(4,8), c3,c4;
    c3=c1 * c2;
    c4=c2 / c1;
    cout<<"c1 * c2="; c3.display();
    cout<<"c2 / c1="; c4.display();
    return 0;
}