C++实验题---填空（类与继承B）

C++实验题---填空（类与继承B）

时间限制(普通/Java):1000MS/3000MS          运行内存限制:65536KByte
总提交:203            测试通过:154

描述

仔细阅读以下程序，理解程序的主要功能，正确补充空白处的语句，空白处可能是一条语句或多条语句，也可能是一个表达式，严禁改动给出程序代码的段落、修改、移动、注释掉给出的程序代码，若有改动、修改或注释掉给出程序的任何一处该题记0分。并编译运行测试通过后进行提交，否则提交错一次扣1分，扣完为止。

#include <iostream>#include<string>using namespace std;class Student                              { public:                                    Student(int n, string nam )              {num=n;name=nam;}   void display()                             {cout<<"num:"<<num<<endl;  cout<<"name:"<<name<<endl;  } _____________                   int num;                                  string name;};

_____________           { public:  Student1(int n,char nam[10],int a):Student(n,nam)          {age=a; }                          void show( )                                 {display();                                 cout<<"age: "<<age<<endl;  } private:                                     int age;                              };

class Student2:public Student1               { public:  Student2(int n, char  nam[10],int a,int s):Student1(n,nam,a){score=s;}   void show_all()                                {   show();                              cout<<"score:"<<score<<endl;                 } private:  _____________                                };

int main( ){ int no,age,score;char name[10]; while(cin>>no>>name>>age>>score) {  Student2 stud(no,name,age,score);  stud.show_all( );                             } return 0;}

输入

输入有多组测试数据，每行为一组测试数据，且用空格隔开个数据。

输出

根据程序代码输出相应的信息。

样例输入

10010 Li 17 89

样例输出

num:10010
name:Li
age: 17
score:89

代码如下：

#include <iostream>#include<string>using namespace std;class Student{public:    Student(int n, string nam )    {        num=n;        name=nam;    }   void display()    {        cout<<"num:"<<num<<endl;        cout<<"name:"<<name<<endl;    }protected:    int num;    string name;};class Student1:public Student{public:    Student1(int n,char nam[10],int a):Student(n,nam)    {        age=a;    }    void show( )    {        display();        cout<<"age: "<<age<<endl;    }private:    int age;};class Student2:public Student1{public:    Student2(int n, char  nam[10],int a,int s):Student1(n,nam,a)    {        score=s;    }   void show_all()    {        show();        cout<<"score:"<<score<<endl;    }     private:    int score;};int main( ){    int no,age,score;    char name[10];    while(cin>>no>>name>>age>>score)    {        Student2 stud(no,name,age,score);        stud.show_all( );    }    return 0;}