阅读以下说明和C++程序，将应填入(n)处的字句写在答题纸的对应栏内。

【说明】

本程序用于评选优秀教师和学生。当输入一系列教师或学生的记录后，将优秀学生及教师的姓名列出来。其类结构如下图所示：

【程序】

include ＜iostream.h＞

include ＜stdio. h＞

class base

{

protected:

char name[8];

public:

void getname(){cout＜＜"name:"; cin＞＞name;}

void printname(){cout＜＜"name:"＜＜name＜＜endl;}

(1)

};

class student: (2)

{

int num;

public:

void getnum()

{cout＜＜"score:"; cin＞＞num;}

bool isgood()

{return (3) }

};

class teacher: (2)

{

int num;

public:

void getnum()

{cout＜＜"paper:"; cin＞＞num;}

bool isgood()

{return (num＞3)?true:false;}

void main()

{

base *p[50];

student *pstud;

teacher *ptech;

char ch;

int count=0;

do{

cout＜＜"input teacher(t) or student(s):";

cin＞＞ch;

if(ch=='s')

{

pstud=new student;

pstud-＞getname();

pstud-＞getnum();

p[count++]=pstud;

}

else if(ch=='t')

{

(4)

ptech-＞getname();

ptech-＞getnum();

p[count++]=ptech;

}

else

cout＜＜"input is wrong"＜＜endl;

cout＜＜"continue to iput(y/n)?";

cin＞＞ch;

}while(ch=='y');

for(int i=0;i＜count;i++)

if((5))

p[i]-＞printname();

}