#include <iostream>
#include <string>
#include <fstream>
using namespace std;

struct NgaySinh
{
	int ngay, thang, nam;
};
struct SV
{
	char MaSV[10], HoTen[30], NoiSinh[50];
	float Diem;
	NgaySinh date;
};


void nhap1(SV &sv)
{
	cin.ignore();
	cout << "Nhap vao Ma Sinh Vien: ";
	cin.getline(sv.MaSV, 10);
	cout << "Nhap vao Ho va Ten: ";
	cin.getline(sv.HoTen, 30);
	cout << "Nhap vao Noi sinh: ";
	cin.getline(sv.NoiSinh, 50);
	cout << "Nhap vao ngay thang nam sinh: ";
	cin >> sv.date.ngay >> sv.date.thang >> sv.date.nam;
	cout << "Nhap vao diem: ";
	cin >> sv.Diem;
}

void nhapnhieu(SV *sv, int n)
{
	cout << "Nhap vao thong tin sinh vien: " << endl << endl;
	for (int i = 0; i < n; i++)
	{
		cout << " + Sinh vien: " << i << endl;
		nhap1(sv[i]);
	}
}

void xuat1(SV sv)
{
	cout << sv.MaSV << " " << sv.HoTen << " " << sv.date.ngay << "/" << sv.date.thang << "/" << sv.date.nam <<" "<< sv.NoiSinh << " " <<sv.Diem << endl;
}

void xuatnhieu(SV *sv, int n)
{
	cout << "Thong tin sinh vien: " << endl << endl;
	for (int i = 0; i < n; i++)
	{
		cout << " + Sinh vien " << i << endl;
		xuat1(sv[i]);
	}
}

void ghivaofile(SV *sv, int n)
{
	fstream file("SV.DAT", ios::out | ios::binary | ios::trunc);
	if (file.is_open())
	{
		for (int i = 0; i < n; i++)
		{
			file.write(reinterpret_cast<char*>(&sv[i]), sizeof(SV));
		}
	}
	else
		cout << "Khong the mo file!" << endl;
	file.close();
}

void xuatfile()
{
	SV sv;
	ofstream F("SV.TXT");
	fstream file("SV.DAT", ios::binary | ios::in);
	cout << "Doc tu file: ";
	while (file.read(reinterpret_cast<char*>(&sv), sizeof(SV)))
	{
		xuat1(sv);
		F << sv.MaSV << " " << sv.HoTen << " " << sv.date.ngay << "/" << sv.date.thang << "/" << sv.date.nam << " " << sv.NoiSinh << " " << sv.Diem;
	}
	file.close();
}

int main()
{
	int n;
	cout << "Nhap vao so luong sinh vien: ";
	cin >> n;
	SV *sv = new SV[n];
	nhapnhieu(sv, n);
	ghivaofile(sv, n);
	xuatfile();
	system("pause");
	return 0;
}