实验报告3.4

#include <bits/stdc++.h>
using namespace std;
class Int
{
public:
    int real;
    Int(int a = 0)
    {
        real = a;
    }
    virtual void show()
    {
        cout << real << endl;
    }
};
class Complex:public Int
{
public:
    Complex(int a = 0, int b = 0):Int(a)
    {
        image = b;
    }
    void show()
    {
        cout << real << "+" << image << "i" << endl;
    }
    Complex operator+(Complex &c2)
    {
        Complex c;
        c.real = real + c2.real;
        c.image = image + c2.image;
        return c;
    }
    friend ostream & operator<<(ostream &output, Complex &c);
private:
    int image;
};
ostream & operator<<(ostream &output, Complex &c)
{
    output << c.real << "+" << c.image << "i" << endl;
    return output;
}
int main()
{
    int  b, d, a, m;
    cin >>a >> b >> m >> d;
    Int t(5);
    Complex c1(a, b), c2(m, d);
    Complex c(0, 0);
    c = c1 + c2;
    cout << c ;
    Int *p = &t;
    p->show();
    p = &c;
    p->show();
    return 0;
}