【分析解答题】

【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;} {{U}} (1) {{/U}} }; class student:{{U}} (2) {{/U}} { int num; public: void getnum() {cout＜＜"score:"; cin＞＞num;} bool isgood() {return{{U}} (3) {{/U}}} }; class teacher:{{U}} (2) {{/U}} { 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’){ {{U}} (4) {{/U}} 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({{U}} (5) {{/U}}) p[i]-＞printname(); }