负数计算-C++

/*
功能：负数计算类 V1.0
作者：wind
日期：2013-10-11
*/

#include <iostream>
#include <string>
using namespace std;
class Complex
{
public:
	Complex(double aX,double aY);
	~Complex();
	void setX(double aX);
	void setY(double aY);
	void Count(Complex other);
private:
	double m_aX;
	double m_aY;
};
Complex :: Complex(double aX =0,double aY=0):
m_aX(aX),m_aY(aY){};
Complex ::~Complex()
{

}
void Complex::setX(double aX)
{
	m_aX = aX;
}
void Complex::setY(double aY)
{
	m_aY = aY;
}
void Complex::Count(Complex other)
{
	string choice;
	cout<<"Please input sign(+/-):";
	cin >> choice;

	double addresultX = m_aX + other.m_aX;
	double addresultY = m_aY + other.m_aY;
	double subtractresultX = m_aX - other.m_aX;
	double subtractresultY = m_aY - other.m_aY;
	cout <<"The result is:";
	if (choice =="+")
	{
         cout <<"("<<addresultX<<","<<addresultY<<")"<<endl;
	}
	else if(choice == "-")
	{
         cout <<"("<<subtractresultX<<","<<subtractresultY<<")"<<endl;
	}


}
int main(void)
{
	Complex P1,P2;
	double p1x,p1y,p2x,p2y;

	cout<<"Please input first complex number(实部,虚部):";
	cin>>p1x>>p1y;
	P1.setX(p1x);
	P1.setY(p1y);

	cout<<"Please input second complex number(实部,虚部):";
	cin>>p2x>>p2y;
	P2.setX(p2x);
	P2.setY(p2y);

	P1.Count(P2);
	system("pause");
	return 0;

}