简单的C++问题。

#include<iostream>
using namespace std;
class Complex{
public:
    double real;
    double image;
    Complex();
    Complex(double a,double b){real=a;image=b;}
    //Complex Add(double a,double b);//两复数相加
    Complex Add(Complex c);//两复数相加结果是复数
    /*Complex Sub(double a,double b);//两复数相
    Complex Sub(Complex c);//两复数相减结果是复数
    bool IsEqual(Complex c);//两复数是否相等
    Complex Multiply(Complex c);//两复数相乘
    Complex Power(int n);//当前复数的n次方
    Complex Divide(Complex c);//两复数相除
    double GetModal();//模
    void Zoom(double x);//将复数扩大X倍*/
    void ShowMe();
};
Complex Complex::Add(Complex c){
    return Complex(real+c.real,image+c.image);
}
/*Complex Complex::Add(double a,double b){
    return Complex(real+a,image+b);
}*/
void Complex::ShowMe(){
    if(image<0.0)
        cout<<real<<image<<"i"<<endl;
    else
        cout<<real<<"+"<<image<<"i"<<endl;
}
int main()
{
    Complex x(1,2),y(3,4);
    Complex c1;
    c1=x.Add(y);
    c1.ShowMe();
    return 0;
}