operator重载之复数计算—C++

/*
功能：复数计算类
作者：wind
日期：2013-11-29
*/
#include <iostream>
#include <string>
using namespace std;
/************************************************************/
class Complex
{
public:
	Complex()
	{
		m_iX = 0;
		m_iY = 0;
	}
	Complex(double aX,double aY);
	void setX(double aX);
	double getX()const;
	void setY(double aY);
	double getY()const;
	Complex operator + (Complex c1);
	Complex operator - (Complex c1);
    void display(Complex c1);
private:
	double m_iX;
	double m_iY;
};
/************************************************************/

void Complex::setX(double aX)
{
	m_iX = aX;
}
double Complex::getX()const
{
	return m_iX;
}
void Complex::setY(double aY)
{
	m_iY = aY;
}
double Complex::getY()const
{
	return m_iY;
}

Complex::Complex(double aX,double aY)
{
	m_iX =  aX;
	m_iY =  aY;
}

Complex Complex::operator + (Complex c1)
{
	Complex c;
	c.m_iX = m_iX + c1.m_iX;
	c.m_iY = m_iY + c1.m_iY;
	return c;
}
Complex Complex::operator - (Complex c1)
{
	Complex c;
	c.m_iX = m_iX - c1.m_iX;
	c.m_iY = m_iY - c1.m_iY;
	return c;
}
void Complex::display(Complex c1)
{
     string n;
	 Complex c;
	 cout<<"Please input the sign(-/+):";
	 cin>>n;
	 if  ("-" == n)
	 {
		 c = operator- (c1);
		 cout<<"The result is"<<"("<<c.m_iX<<","<<c.m_iY<<")"<<endl;
	 }
	 else if ("+" == n)
	 {
		 c = operator+ (c1);
		 cout<<"The result is"<<"("<<c.m_iX<<","<<c.m_iY<<")"<<endl;
	 }
	 else
	 {
         cout<<"The operator is error";
	 }

}
/************************************************************/

int main(void)
{

	Complex c1,c2;
	double aX,aY;

	cout<<"请输入第一个复数:(实部，虚部)：";
	cin>>aX>>aY;
	c1.setX(aX);
	c1.setY(aY);

	cout<<"请输入第二个复数:(实部，虚部)：";
	cin>>aX>>aY;
	c2.setX(aX);
	c2.setY(aY);

	c1.display(c2);

	system("pause");
	return 0;
}