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;}elsecout＜＜'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();}