第十二周任务一

#include <iostream>#include<string>using namespace std;class Student //（1）修改student类中各数据成员和成员函数的访问限定符，并观察发生的现象{public: Student(int n,string nam,char s);void show();~Student( ){ }  protected: int num;string name;char sex ; };class Student1: public Student //（2）修改此处的继承方式，并观察发生的现象{ public: Student1(int n,string nam,char s,int a,string ad):Student(n,nam,s){    age=a;    addr=ad;     }void show1( );~Student1( ){ }  private: int age; string addr; };Student::Student(int n,string nam,char s) {num=n;name=nam;sex=s; }void Student::show(){cout<<"num: "<<num<<endl;cout<<"name: "<<name<<endl;cout<<"sex: "<<sex<<endl<<endl;}void Student1::show1( ){cout<<"num: "<<num<<endl;cout<<"name: "<<name<<endl;cout<<"sex: "<<sex<<endl;cout<<"age: "<<age<<endl;cout<<"address: "<<addr<<endl<<endl;}int main( ){Student1 stud1(10010,"Wang-li",'f',19,"115 Beijing Road,Shanghai");Student1 stud2(10011,"Zhang-fun",'m',21,"213 Shanghai Road,Beijing");Student stud3(20010,"He-xin",'m');stud1.show1( ); stud2.show( ); stud3.show( ); return 0;}

派生类成员不能访问基类私有成员，一般采用公用继承