int GUI2() {
	system("cls");
	color(8);
	gotoxy(5, 3);
	cout << "请输入学生信息:" << endl;
	gotoxy(10, 6);
	cout << "姓名:";
	cin >> name;
	gotoxy(10, 8);
	cout << "  班级:";
	cin >> clas;
	gotoxy(10, 10);
	cout << "  学号:";
	cin >> scnum;
	ofs.open("students.txt",ios_base::app);
	if (!ofs.is_open()) {
		cout << "sorry，打开文件失败!" << endl;
	}
	ofs << "\n";
	ofs << "姓名:";
	ofs << name;
	ofs << "班级:";
	ofs << clas;
	ofs << "学号";
	ofs << scnum;
	ofs.close();
	gotoxy(10, 12);
	cout << "写入成功!" << endl;
	gotoxy(10, 15);
	color(3);
	system("pause");
	return 0;
}

int GUI3() {
	system("cls");
	ifs.open("students.txt", ios_base::app);
	string xx;
	gotoxy(0, 2);
	color(8);
	while (!ifs.eof()) {
		ifs >> xx;
		cout << xx << endl;
	}
	color(0);
	system("pause");
	return 0;
}

int gotoxy(int x, int y) {
	HANDLE hout;
	COORD coord;
	coord.X = x;
	coord.Y = y;
	hout = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorPosition(hout, coord);
	return 0;
}

int color(int c) {
	SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), c);
	return 0;
}