c++学习记录(六)

时间：2020-02-07 09:29:17 阅读：68 评论：0 收藏：0 [点我收藏+]

c++类继承实践

1.实践预想：子类中调用基类的public、private、protected成员函数

2.代码展示：

#include<iostream>
using namespace std;
class Try
{
public:
    Try()
    {
        cout << "测试友元函数以及构造、析构函数使用" << endl;
        length = 0;
        height = 0;
        weight = 0;
    }

    ~Try()
    {
        cout << "测试结束" << endl;
    }

    friend void print(Try try2);


    void print2()
    {
        length += 5;
        weight += 3;
        height += 6;
        cout << "长宽高之积:" << length * height * weight << endl;
    }
    
private:
    void print3()
    {
        length += 5;
        weight += 3;
        height += 6;
        cout << "长宽高之积:" << length * height * weight << endl;
    }
    
protected:
    void print4()
    {
        length += 5;
        weight += 3;
        height += 6;
        cout << "长宽高之积:" << length * height * weight << endl;
    }

    int length;
    int height;
    int weight;
};

void print(Try try2)
{
    try2.length += 5;
    try2.weight += 3;
    try2.height += 6;
    cout << "长宽高之积:" << try2.length * try2.height * try2.weight << endl;
}

class Stry:public Try
{
    public:
        int print5()
        {
            cout<<"长宽高之和："<<length+weight+height<<endl;
        }
};

int main()
{
    Stry abc;
}