.. _ch11-xt9:

习题9
======

看完题目之后可以分成以下步骤：

由于下面要用到string 声明字符串变量，所以记得要包含string 头文件： 

::

    #include <string>

第一步：定义Teacher类
---------------------

1. 声明成员函数和成员数据
``````````````````````````

.. code-block:: c++

   /*按照题目要求声明数据成员，我这里都设置成保护的，目的是不让在类外（例如main函数）使用,
    *当然你也可以设置成public（公有的）
    */

   class Teacher    
   {           
   protected:
       Teacher(string, int, string, string, int, string); 
       //函数声明可以只写形参的类型，构造函数参见第9章263页

       void display();  

       string    name;
       int       age;
       string    sex;
       string    addr;
       int       phone;
       string    title;
    };

2. 类外定义成员函数
````````````````````

.. code-block:: c++

   Teacher::Teacher(string n, int a, string s, string ad, int p, string t):
        name(n), age(a), sex(s), addr(ad), phone(p), title(t){}
      //关于这种构造函数的写法，参见267页9.1.4

   void Teacher::display()
   {
      cout << "姓名：" << name << "\t年龄：" << age << "\t性别：" << sex;
      cout << "\n地址：" << addr << "\t手机号码：" << phone << "\t职称：" << title;   
   }
            
第二步：定义Cadre类
--------------------

1. 声明成员函数和成员数据
``````````````````````````

.. code-block:: c++

   class Cadre
   {   
   protected:
        Cadre(string, int, string, string, int, string);
        void display();

        string   name;
        int      age;
        string   sex;
        string   addr;
        int      phone;
        string   post;
   };

2. 类外定义成员函数
```````````````````

.. code-block:: c++

    Cadre::Cadre(string n, int a, string s, string ad, int p, string po):
         name(n), age(a), sex(s), addr(ad), phone(p),post(po){}

    void Cadre::display()
    {
      cout << "姓名：" << name << "\t年龄：" << age << "\t性别：" << sex;
      cout << "\n地址：" << addr << "\t手机号码：" << phone << "\t职务：" << post;
    }

第三步：定义Teacher_Cadre类
----------------------------

1. 声明成员函数和成员数据
```````````````````````````

.. code-block:: c++

    class Teacher_Cadre: protected Teacher, protected Cadre
    {
    public:
        Teacher_Cadre(string, int, string, string, int, string, string, int);
        void show();

    protected:
        int wages;
    };

2. 类外定义成员函数
``````````````````````

.. code-block:: c++

    Teacher_Cadre::Teacher_Cadre(string n, int a, string s, string ad, int p, string t ,string po, int w):
        Teacher(n, a, s, ad, p, t), Cadre(n, a, s, ad, p, po), wages(w){}

    void Teacher_Cadre::show()
    {
      Teacher::display();
      cout << "\t职务：" <<post << "\t工资 :" <<wages<<endl;
    }

最后一步：定义 main 函数
---------------------------------

.. code-block:: c++

    int main()
    {
        Teacher_Cadre t_g("咧威", 20, "男", "太原科大", 611959, "coder", "worker", 5900);
        t_g.show();

        return 0;
    }