Tic toc toe c++

#include<iostream>
using namespace std;

int num;    //number enter to play.
char ch[9] = { '1','2','3','4','5','6','7','8','9' }; 
char player1 = { 'X' };
char player2 = { 'O' };
void Draw();
void player_1();
void player_2();
bool X_Wins();
bool O_Wins();

int main()
{
	int n = -1;
	cout << "\t\t\t\tTic Toc Toe Game\n" << endl;
	cout << "\t\t\t\tplayer<1>: X\n";
	cout << "\t\t\t\tplayer<2>: O\n";
	cout << "\n\n";
	do
	{
		Draw();
		player_1();
		Draw();
		if (X_Wins())
		{
			cout << "\t\t\t\tPlayer<1> Wins!" << endl;
			n = 1;
			break;
		}
		cout << "\n\n\n";
		player_2();
		Draw();
		if (O_Wins())
		{
			cout << "\t\t\t\tPlayer<2> Wins!" << endl;
			n = 1;
			break;
		}
		cout << "\n\n\n";
	} while (n == -1);

	return 0;
}
//Draw
void Draw()
{
	cout <<"\t\t\t\t"<< ch[0] << "  |  " << ch[1] << "  |  " << ch[2] << "  |  " << "\n";
	cout << "\t\t\t\t----------------" << endl;
	cout << "\t\t\t\t"<<ch[3] << "  |  " << ch[4] << "  |  " << ch[5] << "  |  " << "\n";
	cout << "\t\t\t\t----------------" << endl;
	cout << "\t\t\t\t"<<ch[6] << "  |  " << ch[7] << "  |  " << ch[8] << "  |  " << "\n\n\n";
}
//player 1
void player_1()
{
	cout << "\t\t\t\tPlayer<1> Enter number: ";
	cin >> num;
	switch (num)
	{
	case 1:
		ch[0] = player1;
		break;
	case 2:
		ch[1] = player1;
		break;
	case 3:
		ch[2] = player1;
		break;
	case 4:
		ch[3] = player1;
		break;
	case 5:
		ch[4] = player1;
		break;
	case 6:
		ch[5] = player1;
		break;
	case 7:
		ch[6] = player1;
		break;
	case 8:
		ch[7] = player1;
		break;
	case 9:
		ch[8] = player1;
		break;
	default:
		cout << "\t\t\t\t\nplease, enter number from <1> to <9>!\n\n" << endl;
		player_1();
		break;
	}
}
//player 2
void player_2()
{
	cout << "\t\t\t\tPlayer<2> Enter number: ";
	cin >> num;
	switch (num)
	{
	case 1:
		ch[0] = player2;
		break;
	case 2:
		ch[1] = player2;
		break;
	case 3:
		ch[2] = player2;
		break;
	case 4:
		ch[3] = player2;
		break;
	case 5:
		ch[4] = player2;
		break;
	case 6:
		ch[5] = player2;
		break;
	case 7:
		ch[6] = player2;
		break;
	case 8:
		ch[7] = player2;
		break;
	case 9:
		ch[8] = player2;
		break;
	default:
		cout << "\t\t\t\t\nplease, enter number from <1> to <9>!\n\n" << endl;
		player_2();
		break;
	}
}
//player 1 wins.
bool X_Wins()
{
	if (ch[0] == 'X' && ch[1] == 'X' && ch[2] == 'X')
		return true;
	else if (ch[3] == 'X' && ch[4] == 'X' && ch[5] == 'X')
		return true;
	else if (ch[6] == 'X' && ch[7] == 'X' && ch[8] == 'X')
		return true;
	else if (ch[0] == 'X' && ch[3] == 'X' && ch[6] == 'X')
		return true;
	else if (ch[1] == 'X' && ch[4] == 'X' && ch[7] == 'X')
		return true;
	else if (ch[2] == 'X' && ch[5] == 'X' && ch[8] == 'X')
		return true;
	else if (ch[0] == 'X' && ch[4] == 'X' && ch[8] == 'X')
		return true;
	else if (ch[2] == 'X' && ch[4] == 'X' && ch[6] == 'X')
		return true;
	else
		return false;
}
//player 2 wins.
bool O_Wins()
{
	if (ch[0] == 'O' && ch[1] == 'O' && ch[2] == 'O')
		return true;
	else if (ch[3] == 'O' && ch[4] == 'O' && ch[5] == 'O')
		return true;
	else if (ch[6] == 'O' && ch[7] == 'O' && ch[8] == 'O')
		return true;
	else if (ch[0] == 'O' && ch[3] == 'O' && ch[6] == 'O')
		return true;
	else if (ch[1] == 'O' && ch[4] == 'O' && ch[7] == 'O')
		return true;
	else if (ch[2] == 'O' && ch[5] == 'O' && ch[8] == 'O')
		return true;
	else if (ch[0] == 'O' && ch[4] == 'O' && ch[8] == 'O')
		return true;
	else if (ch[2] == 'O' && ch[4] == 'O' && ch[6] == 'O')
		return true;
	else
		return false;
}

Source: codegrepper.com

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