一、Xmind整理：

二、上课笔记整理：

1.自增运算符重载

#include <iostream>

using namespace std;

class Person
{
   // friend const Person operator+(const Person &L, const Person &R);
private:
    int a;
    int b;
public:
    //无参构造函数
    Person()
    {

    }
    //有参构造函数
    Person(int a, int b):a(a),b(b)
    {

    }

    //成员函数实现 += 运算符重载
    Person  & operator+=(const Person &R)
    {
        a += R.a;
        b += R.b;
        return *this;
    }
    //成员函数实现前置 ++ 运算符的重载
    Person & operator++()
    {
        ++a;
        ++b;
        return *this;
    }
    //成员函数实现后置 ++ 运算符的重载
    const Person operator++(int)
    {
       Person temp;
       temp.a = a++;
       temp.b = b++;
       return temp;
    }
    void show()
    {
        cout << "a = " << a << endl;
        cout << "b = " << b << endl;
    }
};

int main()
{
    Person p1(10,10);
    Person p2(10,10);

    Person p3(5,6);
    p3 += p1;
    p3.show();

    p1 = ++p3;
    p1.show();
    p3.show();

    p1 = p3++;
    p1.show();
    p3.show();

    return 0;
}

2.插入、提取运算符重载

#include <iostream>

using namespace std;

class Person
{
    friend ostream & operator<<(ostream &cout , const Person &p);
    friend istream & operator>>(istream &cin , Person &p);
private:
    int a;
    int b;
public:
    //无参构造函数
    Person()
    {

    }
    //有参构造函数
    Person(int a, int b):a(a),b(b)
    {

    }
};
//全局函数实现插入运算符重载
ostream & operator<<(ostream &cout , const Person &p)
{
    cout << p.a << endl;
    cout << p.b << endl;
    return cout;
}

//全局函数实现提取运算符重载
istream & operator>>(istream &cin , Person &p)
{
    cin >> p.a;
    cin >> p.b;
    return cin;
}


int main()
{
    Person p1(10,10);
    cout << p1 <<endl;
    cout << "==================" << endl;
    Person p2;
    cin >> p2;
    cout << p2;
    return 0;
}