06 继承的引出_

非继承的写法

#include <iostream>
using namespace std;


class News
{
public:
    void header()
    {
        cout << "公共头部" << endl;
    }
    void footer()
    {
        cout << "公共底部" << endl;
    }
    void left()
    {
        cout << "左侧列表" << endl;
    }
    void content()
    {
        cout << "新闻播报" << endl;
    }
};
class YULE
{
public:
    void header()
    {
        cout << "公共头部" << endl;
    }
    void footer()
    {
        cout << "公共底部" << endl;
    }
    void left()
    {
        cout << "左侧列表" << endl;
    }
    void content()
    {
        cout << "白百何-------" << endl;
    }
};
void Test()
{
    //新闻页
    News news;
    news.content();
    news.footer();
    news.header();
    news.left();


    //娱乐页
    YULE yule;
    yule.content();
    yule.footer();
    yule.header();
    yule.left();
}
int main()
{
    Test();
   // std::cout << "Hello World!\n";
}

　　继承写法

//继承写法
//抽象一个 基类的网页，重复的代码都写在这个网页上
class BasePage
{
public:

    void header()
    {
        cout << "公共头部" << endl;
    }
    void footer()
    {
        cout << "公共底部" << endl;
    }
    void left()
    {
        cout << "左侧列表" << endl;
    }
};


class NewsPage :public BasePage
{
public:
    void content()
    {
        cout << "新闻播报" << endl;
    }
};

class YULEPage :public BasePage
{
public:
    void content()
    {
        cout << "白百何-------" << endl;
    }
};
class GamePage :public BasePage
{ 
public:
    void content()
    {
        cout << "游戏新闻" << endl;
    }
};
void Test02()
{
         cout << "新闻网页-------" << endl;
        NewsPage news;
        news.content();
        news.footer();
        news.header();
        news.left();

        cout << "娱乐网页-------" << endl;
        YULEPage yule;
        yule.content();
        yule.footer();
        yule.header();
        yule.left();
        cout << "游戏网页-------" << endl;
        GamePage game;
        game.content();
        game.footer();
        game.header();
        game.left();
}

//继承，减少代码重复性
//BasePage 基类  子类
//NewsPage 派生类  父类
//YULEPage 派生类  父类
//GamePage 派生类  父类
int main()
{
    Test02();
   // std::cout << "Hello World!\n";
}