第7题

#include <iostream>using namespace std;class Student {public:   Student(int n,float s):num(n),score(s){}   void change(int n,float s) {num=n;score=s;}   void display() {cout<<num<<" "<<score<<endl;}  private:   int num;   float score; };int main(){Student stud(101,78.5); Student *p=&stud; p->display(); p->change(101,80.5); p->display(); return 0;}