4.18

#include<iostream>using namespace std;class student{public:student(int a,int b){number=a;performance=b;}void display();void Max(student *p);private:int number;int performance;};void student::display(){ cout<<"成绩最高的学生的学号："<<number<<endl;  cout<<"成绩最高的学生的成绩："<<performance<<endl<<endl;}void student::Max(student *k){int max;max=k->performance;for(int i=0;i<5;i++){student *q;k++;if(k->performance>max)max=k->performance;}for(int j=0;j<5;j++){if(k->performance=max)k->display;k++;}}int main(){student *p;student stu[6]={student(01,68),student(02,50),student(03,99),student(04,77),student(05,33),student(06,88)};p=stu;p->Max(p);p->display();return 0;}