第十二周上机任务1

#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);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;}Student1::Student1(int n,string nam,char s,int a,string ad):Student(n,nam,s) {age=a; addr=ad;}void Student1::show1( ){cout<<"num: "<<num<<endl;//不能访问基类中的private成员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( ); //在类外不能访问protected和private数据成员及成员函数system("pause");return 0;}

运行结果：

num: 10010
name: Wang-li
sex: f
age: 19
address: 115 Beijing Road,Shanghai


num: 10011
name: Zhang-fun
sex: m


num: 20010
name: He-xin
sex: m


请按任意键继续. . .