4.17&4.18

#include<iostream>
#include<string>
using namespace std;
class student{
public:
	void show()
	{
		cout<<name<<"  "<<number<<"   "<<test<<endl;
	}
	student(string x,int y,int z);
friend void max(student *i);
private:
	string name;
	long int number;
	int test;
};
student::student(string x,int y,int z)
{
	name=x;
	number=y;
	test=z;
}
void max(student *i)
{
	int t,e=0,big=i[0].test;
	for(t=1;t<6;t++)
	{
		if(big<i[t].test)
		{
			big=i[t].test;
			e=t;
		}
	}
	cout<<"六位同学中成绩最高的是："<<i[e].name<<endl;  
    cout<<"他的成绩是"<<big<<endl; 
}
int main()
{
	student st1[6]={
		student("liming",20141143,99),
		student("lihong",20141144,98),
		student("lihan",20141165,57),
		student("wanghan",20141161,88),
		student("mingming",201411166,87),
		student("jiangming",20141152,68)
	};
	student *p;
	p=st1;
	p+=1;
	p->show();
	p=p+2;
	p->show();
	p=p+2;
	p->show();
	max(st1);
	
	return 0;
}