问答题

【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(); }