一、Xmind整理：

二、上课笔记整理：

1.静态数据成员+静态成员函数（银行账户实例）

#include <iostream>

using namespace std;

class BankAccount
{
private:
    double balance;   //余额
    static double interest_rate;   //利率
public:
    //无参构造函数
    BankAccount ()
    {

    }
    //有参构造函数
    BankAccount(double balance):balance(balance)
    {

    }
    //静态成员函数,获取当前利率
    static double getInterestRate()
    {
        return interest_rate;
    }
    //静态成员函数，设置当前利率、
    static double setInterestRate(double rate)
    {
        interest_rate = rate;
    }
    //静态成员函数，获取连本带利的全额
    static double getLastMoney(BankAccount &account)
    {
        return account.balance*(1+interest_rate);
    }
};

double BankAccount::interest_rate = 0.05;

int main()
{
    cout << "当前利率：" << BankAccount::getInterestRate() << endl;

    BankAccount::setInterestRate(0.03);
    cout << "当前利率：" << BankAccount::getInterestRate() << endl;

    BankAccount account1(2000.0);
    BankAccount account2(3000.0);
    cout << "第一个人连本带利的余额为：" << BankAccount::getLastMoney(account1) << endl;

    return 0;
}

2.类的继承

#include <iostream>

using namespace std;

//封装 人  类  父类/基类
class Person
{
private:
    string name;
protected:
    int age;
public:
    int h;
public:
    //无参构造函数
    Person()
    {
        cout << "父类的无参构造函数" << endl;
    }

    //有参构造
    Person(string name, int age, int h):name(name),age(age),h(h)
    {
        cout << "父类的有参构造函数" << endl;
    }
    //拷贝构造函数
    Person(const Person & other):name(other.name),age(other.age),h(other.h)
    {
        cout << "父类的拷贝构造函数"  << endl;
    }

    //拷贝赋值函数
    Person & operator=(const Person &p)
    {
        name = p.name;
        age = p.age;
        h = p.h;
        cout << "父类的拷贝赋值函数" << endl;
        return  *this;
    }

    void show()
    {
        cout << "父类的show" << endl;
    }
};

//封装 学生 类   共有继承人 类
class Stu:public Person   //子类 、派生类
{
private:
    int id;
    int math;


public:
    //无参构造函数
    Stu()
    {
        cout << "子类的无参构造函数" << endl;
    }

    //有参构造函数
    Stu(string name, int age, int h, int id, int math):Person(name,age,h),id(id),math(math)
    {
        cout << "子类的有参构造函数" << endl;
    }

    //拷贝构造函数
    Stu(const Stu & s):id(s.id),math(s.math),Person(s)
    {
        cout << "子类的拷贝构造函数" << endl;
    }

    //拷贝赋值函数
    Stu & operator=(const Stu & s)
    {
        Person::operator=(s);
        id = s.id;
        math = s.math;
        cout << "子类的拷贝赋值函数" << endl;
        return *this;
    }

    void show()
    {
        cout << "子类的show" << endl;
        cout << h << endl; //通过共有继承，类外、子类可以访问父类共有成员
        cout << age << endl; //通过共有继承，子类可以访问父类保护成员,类外不可以访问
        //cout << name << endl;//通过共有继承，子类不可访问父类私有成员,类外不可以访问
    }
};

int main()
{
    Stu s("zhangsan",12,190,1001,78);
    Stu s2=s;

    Stu s3;
    s3 = s2;

//    s.show();
//    s.Person::show();

    return 0;
}

3.多继承

#include <iostream>

using namespace std;

class Sofa
{
private:
    string sitting;
public:
    //无参构造函数
    Sofa()
    {
        cout << "沙发的无参构造" << endl;
    }
    //有参构造函数
    Sofa(string s):sitting(s)
    {
        cout << "沙发的有参构造" << endl;
    }
    void display()
    {
        cout << sitting << endl;
    }
};

class Bed
{
private:
    string sleep;
public:
    //无参构造函数
    Bed()
    {
        cout << "床的无参构造" << endl;
    }
    //有参构造函数
    Bed(string(s)):sleep(s)
    {
         cout << "床的有参构造" << endl;
    }
    void display()
    {
        cout << sleep << endl;
    }
};

class Sofa_Bed:public Bed,public Sofa
{
private:
    int w;
public:
    //无参构造函数
    Sofa_Bed()
    {
        cout << "沙发床的无参构造" << endl;
    }
    //有参构造函数
    Sofa_Bed(string sit, string s, int w):Bed(s),Sofa(sit),w(w)
    {
         cout << "沙发床的有参构造" << endl;
    }
};
int main()
{
    Sofa_Bed(s);
    Sofa_Bed s1("可坐","可躺",123);
    s1.Sofa::display();
    s1.Bed::display();
    return 0;
}