调用成员函数重载运算符

#include <iostream>

using namespace std;

class Complex
{
private:
    int real;
    int p_w_picpath;
public:
    Complex(int real=0,int p_w_picpath=0):real(real),p_w_picpath(p_w_picpath)
    {
        cout<<"Complex::Complex():"<<this<<endl;
    }
    Complex(const Complex &x):real(x.real),p_w_picpath(x.p_w_picpath)
    {
        cout<<"Complex::Complex(Complex &):"<<this<<endl;
    }
    ~Complex()
    {
         cout<<"Complex::~Complex():"<<this<<endl;
    }
    Complex operator+(const Complex &c)
    {
        return Complex(real+c.real,p_w_picpath+c.p_w_picpath);
    }
    Complex operator-(const Complex &c)
    {
        return Complex(real-c.real,p_w_picpath-c.p_w_picpath);
    }
    void show()const
    {
        cout<<real;
        if(p_w_picpath>0)
            cout<<"+";
        cout<<p_w_picpath<<"i"<<endl;
    }

};
int main(int argc, char *argv[])
{
   Complex a(10,20);
   Complex b(70,80);
   Complex c=a+b;
   Complex d=a-b;
   a.show();
   b.show();
   c.show();
   d.show();
   return 0;
}