#include "stdafx.h"
#include <iostream>
#include<string>
#include<windows.h>
using namespace std;
class thisinh
{
private:
	char sbd[25];
	float toan, ly, hoa;
public:

	void nhap()
	{
		fflush(stdin);
		cout << "\n------------------------------------------------------------\n";

		cout << "Nhap so bao danh :    ";
		cin >> sbd;
		do{
			cout << "Nhap diem toan :    ";
			cin >> toan;
			if (toan<0 || toan>10){

				cout << "\nNhap lai 0 < diem toan <10" << endl;
				system("cls");
			}
		} while (toan<0 || toan>10);

		do{
			cout << "Nhap diem ly :    ";
			cin >> ly;
			if (ly<0 || ly>10){
				cout << "\nNhap lai 0 < diem ly <10" << endl;
				system("cls");
			}

		} while (ly<0 || ly>10);
		do{
			cout << "Nhap diem hoa :    ";
			cin >> hoa;
			if (hoa<0 || hoa>10){

				cout << "\nNhap lai 0 < diem hoa <10" << endl;
				system("cls");
			}
		} while (hoa<0 || hoa>10);
	}
	void in()
	{
		cout << "SBD: " << sbd;
		cout << "\tDiem toan:" << toan << "\tDiem ly:" << ly << "\tDiem hoa:" << hoa;
		cout << "\tTong diem: " << tongdiem() << endl;
	}


	float tongdiem()
	{
		return(toan + ly + hoa);
	}
};

class ds
{
private:
	int n;
	thisinh ts[100];

public:


	void nhapds()
	{
		cout << "Nhap vao so luong thi sinh:  ";
		cin >> n;
		for (int i = 0; i < n; i++)
			ts[i].nhap();
	}


	void inds()
	{
		for (int i = 0; i < n; i++)
			ts[i].in();
	}
	void sapxep()
	{

		for (int i = 0; i < n - 1; i++)
		for (int j = i + 1; j<n; j++)
		if (ts[i].tongdiem()>ts[j].tongdiem())
		{
			thisinh tg;
			tg = ts[i];
			ts[i] = ts[j];
			ts[j] = tg;
		}
	}

	void tongdiemtren18()
	{

		for (int i = 0; i<n; i++)
		if (ts[i].tongdiem()>18)
			ts[i].in();
	}

};
int main()
{
	ds ds1;
	ds1.nhapds();
	system("cls");
	cout << "\nDanh sach cac thi sinh sap xep theo thu tu tang dan ve tong diem:\n" << endl;
	ds1.sapxep();
	ds1.inds();
	cout << "--------------------------------------------------------------------------\n";
	cout << "\nDanh sach cac thi sinh co tong diem tren 18 la: \n" << endl;
	ds1.tongdiemtren18();

	return 0;
}