Question

Modify the attached TicTacToeStart.cpp

Your job is to complete three functions init, printBoard, and gameOver

#include <iostream>

using namespace std;

char gameBoard[3][3];

void init(){

    /*

    using a double loop to initialize all gameBoard element as 'E'

    */

}

void printBoard()

{

    /*using a double loop to print out gameboard

    */

}

bool gameOver()

{

    /*if any row or column, or diagonal are all X or O, return true*/

    return false;

}

int main()

{

    char again;

    do{

        bool done=false;

        bool xTurn=true;

        int count=0;

        init();

        while(!done){

            printBoard();

            if(xTurn)

                cout<<"It's X's turn"<<endl;

            else

                cout<<"It is O's turn"<<endl;

            int row, col;

            do{

                cout<<"Please enter two integer to specify an empty spot:";

                cin>>row>>col;

            }while(gameBoard[row-1][col-1]!='E');

            if(xTurn)

                gameBoard[row-1][col-1]='X';

            else

                gameBoard[row-1][col-1]='O';

            count++;

            if(gameOver()){

                done=true;

                if(xTurn)

                    cout<<"X wins!"<<endl;

                else

                    cout<<"O wins!"<<endl;

            }else if(count==9){

                done=true;

                cout<<"It's a tie!"<<endl;

            }

            xTurn=!xTurn;

        }

        cout<<"Play again? Enter y to continue:";

        cin>>again;

    }while(again=='y' || again=='Y');

    return 0;

}

Answer 1

In this code, intialized the size parameter method , Also taken a variable gameBoard which can be passed in all those 3 functions to make them work .

Here is the code :->

#include <iostream>

using namespace std;
#define side 3    //Defined the tic toe size as 3

    void init(char gameBoard[][side]){
    /*
    using a double loop to initialize all gameBoard element as 'E'
    */
        for (int i=0; i<side; i++) 
        { 
            for (int j=0; j<side; j++) 
                gameBoard[i][j] = 'E'; 
        }
        return;

    }


    void printBoard(char gameBoard[][side])
    {
        /*using a double loop to print out gameboard
        */
        
        for (int i=0; i<side; i++) 
        { 
            for (int j=0; j<side; j++) {
                printf("%c\t",gameBoard[i][j]);
            }
            printf("\n");
        }
    }


    bool gameOver(char gameBoard[][side])
    {
        /*if any row or column, or diagonal are all X or O, return true*/
        
        
        // Checking Row elements
        for (int i=0; i<side; i++) 
        { 
            if (gameBoard[i][0] == gameBoard[i][1] && 
                gameBoard[i][1] == gameBoard[i][2] &&  
                gameBoard[i][0] != 'E') 
                return true; 
        } 
        
        // Checking column elements
        for (int i=0; i<side; i++) 
        { 
            if (gameBoard[0][i] == gameBoard[1][i] && 
                gameBoard[1][i] == gameBoard[2][i] &&  
                gameBoard[0][i] != 'E') 
                return true; 
        } 
  
        // Checking Diagnol elements
        if (gameBoard[0][0] == gameBoard[1][1] && 
            gameBoard[1][1] == gameBoard[2][2] &&  
            gameBoard[0][0] != 'E') 
            return true; 
          
        // Checking 2nd way Diagnol elements  
        if (gameBoard[0][2] == gameBoard[1][1] && 
            gameBoard[1][1] == gameBoard[2][0] && 
            gameBoard[0][2] != 'E') 
            return true; 
  
        return false;
    }

    int main()
    {
        char again;
    
        do
        {
            bool done=false;
            bool xTurn=true;
            int count=0;
            
            char gameBoard[side][side];    // Assigned the gameBoard array variable
            
            init(gameBoard);             // passing the parameter  for intializating E in every cell
            while(!done){
                printBoard(gameBoard);   // passing the parameter for printing board
                if(xTurn)
                    cout<<"It's X's turn"<<endl;
                else
                    cout<<"It is O's turn"<<endl;
                int row, col;
                do
                {
                    cout<<"Please enter two integer to specify an empty spot:";
                    cin>>row>>col;
                }while(gameBoard[row-1][col-1]!='E');
                if(xTurn)
                    gameBoard[row-1][col-1]='X';
                else
                    gameBoard[row-1][col-1]='O';
                
                count++;
                if(gameOver(gameBoard)){     // passing the parameter to check 
                    done=true;
                    if(xTurn)
                        cout<<"X wins!"<<endl;
                    else
                        cout<<"O wins!"<<endl;
                }
                else if(count==9)
                {
                    done=true;
                    cout<<"It's a tie!"<<endl;
                }
                xTurn=!xTurn;
            }
            cout<<"Play again? Enter y to continue:";
            cin>>again;
            
        }while(again=='y' || again=='Y');
        
        return 0;
    }
    

Hope it helps !!! If any issue , Do Comment.