4.18

#include<iostream>using namespace std;class exam{public:exam(int n,float s){number=n;score=s;}void max(exam *ob){ float big=ob->get_sco();int i;for(i=1;i<6;i++){ob++;if(big<ob->get_sco())big=ob->get_sco();}cout<<"最大值为:"<<big<<endl;for(i=1;i<6;i++){if(big==ob->get_sco())cout<<"最高分者学号是："<<ob->get_num()<<endl;ob--;}}int get_num(){return number;}float get_sco(){return score;}private:int number;float score;};int main(){exam ob1[6]={exam(1,60),exam(2,90),exam(3,70),exam(4,100),exam(5,30),exam(6,99)};ob1[0].max(ob1);system("pause");return 0;}