This simple Tic Tac Toe game will invite two players to enter their names and to play a quick round. Player 1 is 'x' and player 2 is 'o.' The players will be given a 3x3 board that will have a number, 0 through 8, assigned to each space. On their turn, the players will enter the number of the space that they wish to play. When a player has marke…

gistfile1.cpp

#include <iostream>
#include <string>

using namespace std;

char board [9];

void display_board (void);
bool validate (int z);
int winner ();  //returns a 0 for draw, 1 for player 1, and 2 for player 2

int main()
{

    //delcaration of local variables
    string player_1;
    string player_2;
    int turn = 1;       //the number assigned to turn will indicate which player's turn it is (1 or 2)
    int move;
    int total_turns = 0;    //counter for total moves of the game


    //declaration of board spaces
    board[0] = '0';
    board[1] = '1';
    board[2] = '2';
    board[3] = '3';
    board[4] = '4';
    board[5] = '5';
    board[6] = '6';
    board[7] = '7';
    board[8] = '8';

    //obtain and store player names
    cout<<"Player 1, please enter your name: "<<endl;
    cin>>player_1;
    cout<<"Player 2, please enter your name: "<<endl;
    cin>>player_2;

    while (winner() == 0 && total_turns < 9){

        do{
            //display the board
            display_board();

            //indicate to players whose turn it is
            if (turn == 1){
                cout<< player_1 << ": it's your turn!"<<endl;
            } else {
                cout<< player_2 << ": it's your turn!"<<endl;
            }

            //ask player to make a move
            cout<<"Please enter the number of the space where you'd like to move: "<<endl;
            cin>>move;
        } while (validate (move) != true);

        //increment the total number of moves for the game
        total_turns++;


        //mark the board and switch to the other player's turn
        switch (turn) {
            case (1): {
                board[move] = 'x';
                turn = 2;
                break;
            }
            case (2): {
                board[move] = 'o';
                turn = 1;
                break;
            }

        }
    }

    //display the board
    display_board();

    if (winner() == 1)
        cout<<"Congrats "<<player_1<<", you have won!"<<endl;
    else if (winner() == 2)
        cout<<"Congrats "<<player_2<<", you have won!"<<endl;
    else
        cout<<"Looks like you're an even match..."<<endl;

    return 0;
}



//this function will show the current state of the board in the game and will return nothing to main
void display_board(){
    cout<<endl;
    cout<< board[0] << " | " << board[1] << " | " << board [2]<< endl;
    cout<<"--+---+--"<<endl;
    cout<< board[3] << " | " << board[4] << " | " << board [5] << endl;
    cout<<"--+---+--"<<endl;
    cout<< board[6] << " | " << board[7] << " | " << board [8] << endl;
}

//take the players move and determin if it as valid move on the
//current board and will return a Boolean value
bool validate(int z){
    if (board[z] != 'x' && board[z] != 'o')
        return true;
    else
        return false;
}

//This function will check for the eight instances in which one of the players may have
//won the game returning 1 for player 1, 2 for player 2, or a 0 for a draw

int winner (){
    //check for winning horizontally
    if (board[0] == board[1] && board[1] == board[2]){
        if (board[0] == 'x' )
            return 1;
        else
            return 2;
    }
    if (board[3] == board[4] && board[4] == board[5]){
        if (board[3] == 'x' )
            return 1;
        else
            return 2;
    }
    if (board[6] == board[7] && board[7] == board[8]){
        if (board[6] == 'x' )
            return 1;
        else
            return 2;
    }
    //check for winning vertically
    if (board[0] == board[3] && board[3] == board[6]){
        if (board[0] == 'x' )
            return 1;
        else
            return 2;
    }
    if (board[1] == board[4] && board[4] == board[7]){
        if (board[1] == 'x' )
            return 1;
        else
            return 2;
    }
    if (board[2] == board[5] && board[5] == board[8]){
        if (board[2] == 'x' )
            return 1;
        else
            return 2;
    }
   //check for winning diagonally
    if (board[0] == board[4] && board[4] == board[8]){
        if (board[0] == 'x' )
            return 1;
        else
            return 2;
    }
    if (board[2] == board[4] && board[4] == board[6]){
        if (board[2] == 'x' )
            return 1;
        else
            return 2;
    } else          //else return 0 for a draw
        return 0;

}