4.18

在作业4.17的基础上，用学生类的对象指针作为参数，用一个循环选出最高成绩，一个循环输出最高成绩的学生的学号！

#include<iostream>using namespace std;class student{public:student(double a,int b){number=a;score=b;}int show();double show1();private:double number;int score;};int student::show(){return score;}double student::show1(){return number;}void max(student *p){int i;int big;big=p->show();for(i=1;i<6;i++){p++;if(big<p->show())big=p->show();}cout<<"最高成绩是："<<big<<endl;for(int j=0;j<6;j++){if(big==p->show())cout<<"该学生的学号是："<<p->show1()<<endl;p--;}}int main(){student stu[6]={student(01,96),student(02,100),student(03,70),student(04,60),student(05,50),student(06,80)};student *pr;pr=stu;max(pr);system("pause");      return 0; }