第十一周阅读程序----程序1

//基类。派生类。构造函数的写法及执行过程。#include <iostream>#include <string>using namespace std;class Student//声明基类{public:                                  //公用部分    Student(int n, string nam )             //基类构造函数，与例.5相同    {        num=n;        name=nam;    }    void display( )                           //成员函数，输出基类数据成员    {        cout<<"num:"<<num<<endl<<"name:"<<name<<endl;    }protected:                              //保护部分    int num;    string name;};class Student1: public Student              //声明公用派生类Student1{public:    Student1(int n, string nam,int n1, string nam1,int a, string ad): Student(n,nam),monitor(n1,nam1) //派生类构造函数    {        age=a;        addr=ad;    }    void show( )    {        cout<<"This student is:"<<endl;        display();                               //输出num和name        cout<<"age: "<<age<<endl;                //输出age        cout<<"address: "<<addr<<endl<<endl;     //输出addr    }    void show_monitor( )                        //成员函数，输出子对象    {        cout<<endl<<"Class monitor is:"<<endl;        monitor.display( );                       //调用基类成员函数    }private:                                      //派生类的私有数据    Student monitor;                          //定义子对象(班长)    int age;    string addr;};int main( ){    Student1 stud1(10010,"Wang-li",10001,"Li-sun",19,"115 Beijing Road,Shanghai");    stud1.show( );                       //输出学生的数据    stud1.show_monitor();                //输出子对象的数据    return 0;}

体会：

将protected 改为private，编译不通过。