未分类题

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();
}