C++第10/11周项目 继承与派生 【项目2 - 存储班长信息的学生类】(复习新版)

/*

*copyright(c) 2016,烟台大学计算机学院

*All rights reserved

*文件名称：test.cpp

*作者：谭泽纯

*版本：v6.0

*

*问题描述：

【项目2 - 存储班长信息的学生类]

<code class="hljs cs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">class Stu   <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//声明基类</span>
{
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span>:
<span class="hljs-title" style="box-sizing: border-box;">Stu</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> n, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> nam );  <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//基类构造函数</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> display( );          <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//成员函数，输出基类数据成员</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">protected</span>:        //（*）访问权限为保护型的数据成员
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> num;      <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生学号</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> name;  <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生姓名</span>
};
class StuDetail: <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span> Stu              //声明派生类StuDetail
{
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">public</span>:
//学生nam，学号n，a岁，家住ad，他的班长是nam1，学号n1
<span class="hljs-title" style="box-sizing: border-box;">StuDetail</span>(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> n, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> nam,<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> a, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> ad,<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> n1, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> nam1); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//派生类构造函数</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> show( ); <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//成员函数，输出学生的信息</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span> show_monitor( );    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//成员函数，输出班长信息</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">private</span>:
Stu monitor;   <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生所在班的班长，班长是学生，是Stu类的成员</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> age;       <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生年龄</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">string</span> addr;   <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生的住址</span>
};
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">int</span> main( )
{
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//学生王力，10010号，19岁，家住上海的北京路，他的班长是李孙，学号10001</span>
StuDetail s(<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10010</span>,<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Wang-li"</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">19</span>,<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"115 Beijing Road,Shanghai"</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10001</span>,<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Li-sun"</span>);
s.show( );                       <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//输出学生信息</span>
s.show_monitor();                <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//输出班长信息</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>;
}</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li></ul>

（1）上面是声明好的类及测试函数，请完成类中成员函数的定义，使运行结果如图所示。

（2）将Stu类的数据成员的访问权限改为private，你的程序是否能完成要求的功能？如果不行，请修改程序。请不要修改给出的代码，只能修改自己写的代码。

*/

#include<iostream>

#include<string>

using namespace std;

class Stu //声明基类

{

public:

Stu(int n, string nam ):num(n),name(nam){}

void display( )

{

cout<<num<<" "<<name<<endl;

}

protected: //（*）访问权限为保护型的数据成员

int num; //学生学号

string name; //学生姓名

};

class StuDetail: public Stu //声明派生类StuDetail

{

public:

//学生nam，学号n，a岁，家住ad，他的班长是nam1，学号n1

StuDetail(int n, string nam,int a, string ad,int n1, string nam1):Stu(n,nam),monitor(n1,nam1),age(a),addr(ad){}

void show( )

{

cout<<name<<" "<<num<<" "<<age<<" "<<addr<<endl;

}

void show_monitor( )

{

monitor.display();

}

private:

Stu monitor; //学生所在班的班长，班长是学生，是Stu类的成员

int age; //学生年龄

string addr; //学生的住址

};

int main( )

{

//学生王力，10010号，19岁，家住上海的北京路，他的班长是李孙，学号10001

StuDetail s(10010,"Wang-li",19,"115 Beijing Road,Shanghai",10001,"Li-sun");

s.show( ); //输出学生信息

s.show_monitor(); //输出班长信息

return 0;

}