Question

I need help solving this in c++ using visual Studio.

For this assignment, you will be filling in missing pieces of code within a program, follow the comments in the code. These comments will describe the missing portion. As you write in your code, be sure to use appropriate comments to describe your work.

After you have finished, test the code by compiling it and running the program, then turn in your finished source code.

// TicTacToe.cpp: Follow along with the comments to create a fully functional Tic Tac Toe game
// that uses function calls. Each function will get called multiple times during the execution
// of the code, however, the code itself only needed to be written once. Also notice the use of
// an array to store the contents of the board. The comments marked with a TODO denote where code
// needs to be added.

#include "stdafx.h"
#include <iostream>
using namespace std;

char boardTile[10] = { 'o', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

//Write the function declarations
bool checkValidMove(int);
void drawBoard();
//TODO: Write the declaration for the function that checks for a winner

int main()
{
   int player = 1, i, choice;
   char mark;
   bool isMoveValid = false;
   do
   {
       //TODO: Call the function that draws the game board

       player = (player % 2) ? 1 : 2;
       cout << "Player " << player << ", enter a number: ";
       cin >> choice;
       mark = (player == 1) ? 'X' : 'O';

       //TODO: Call the checkValidMove function, make sure to save the return value in one of the variables

       if (isMoveValid){
           boardTile[choice] = mark;
       }
       else{
           cout << "Invalid move ";
           player--;
           cin.ignore();
           cin.get();
       }

       i = checkForWinner();
       player++;
   } while (i == -1);

   drawBoard();
   if (i == 1)
       cout << "==>Player " << --player << " wins!";
   else
       cout << "==>Game draw";
   cin.ignore();
   cin.get();
   return 0;
}

// Check the board for a winner.
// Returning a -1 is keep playing
// Returning a 0 is a draw (or cat wins)
// Returning a 1 shows a winner
int checkForWinner()
{
   //TODO: Read through the code in this function. Based on the commented rules before the function, determine
   //what type of return statement belongs in each of the comments below.
   if ((boardTile[1] == boardTile[2] && boardTile[2] == boardTile[3])
       || (boardTile[4] == boardTile[5] && boardTile[5] == boardTile[6])
       || (boardTile[7] == boardTile[8] && boardTile[8] == boardTile[9])
       || (boardTile[1] == boardTile[4] && boardTile[4] == boardTile[7])
       || (boardTile[2] == boardTile[5] && boardTile[5] == boardTile[8])
       || (boardTile[3] == boardTile[6] && boardTile[6] == boardTile[9])
       || (boardTile[1] == boardTile[5] && boardTile[5] == boardTile[9])
       || (boardTile[3] == boardTile[5] && boardTile[5] == boardTile[7]))
   {
       //Insert return statement
   }
   else if (boardTile[1] != '1' && boardTile[2] != '2' && boardTile[3] != '3'
       && boardTile[4] != '4' && boardTile[5] != '5' && boardTile[6] != '6'
       && boardTile[7] != '7' && boardTile[8] != '8' && boardTile[9] != '9')
   {
       //Insert return statement
   }
   else
   {
       //Insert return statement
   }
}

// Draw the board with the player marks
void drawBoard()
{
   system("cls");
   cout << "\n\n\tTic Tac Toe\n\n";
   cout << "Player 1 has 'X' - Player 2 has 'O'" << endl << endl;
   cout << endl;
   cout << " | | " << endl;
   cout << " " << boardTile[1] << " | " << boardTile[2] << " | " << boardTile[3] << endl;
   cout << "_____|_____|_____" << endl;
   cout << " | | " << endl;
   cout << " " << boardTile[4] << " | " << boardTile[5] << " | " << boardTile[6] << endl;
   cout << "_____|_____|_____" << endl;
   cout << " | | " << endl;
   cout << " " << boardTile[7] << " | " << boardTile[8] << " | " << boardTile[9] << endl;
   cout << " | | " << endl << endl;
}

//Check if the player's move is valid or if the tile has already been taken
//TODO: Based on the function initiation at the beginning of the program, write the function signature, make sure the variable names are consistent

{
   bool isValid = false;
   char aChar = '0' + choice;
   if (choice > 0 && choice <= 9){
       if (boardTile[choice] == aChar){
           isValid = true;
       }
   }

   return isValid;
}

Answer 1

Screenshot

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Program

#include <iostream>
using namespace std;

char boardTile[10] = { 'o', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

//Write the function declarations
bool checkValidMove(int);
void drawBoard();
int checkForWinner();

int main()
{
   int player = 1, i, choice;
   char mark;
   bool isMoveValid = false;
   do
   {
       //TODO: Call the function that draws the game board
       drawBoard();
       player = (player % 2) ? 1 : 2;
       cout << "Player " << player << ", enter a number: ";
       cin >> choice;
       mark = (player == 1) ? 'X' : 'O';

       //TODO: Call the checkValidMove function, make sure to save the return value in one of the variables
       isMoveValid = checkValidMove(choice);
       if (isMoveValid) {
           boardTile[choice] = mark;
       }
       else {
           cout << "Invalid move ";
           player--;
           cin.ignore();
           cin.get();
       }

       i = checkForWinner();
       player++;
   } while (i == -1);

   drawBoard();
   if (i == 1)
       cout << "==>Player " << --player << " wins!";
   else
       cout << "==>Game draw";
   cin.ignore();
   cin.get();
   return 0;
}

// Check the board for a winner.
// Returning a -1 is keep playing
// Returning a 0 is a draw (or cat wins)
// Returning a 1 shows a winner
int checkForWinner()
{
   //TODO: Read through the code in this function. Based on the commented rules before the function, determine
   //what type of return statement belongs in each of the comments below.
   if ((boardTile[1] == boardTile[2] && boardTile[2] == boardTile[3])
       || (boardTile[4] == boardTile[5] && boardTile[5] == boardTile[6])
       || (boardTile[7] == boardTile[8] && boardTile[8] == boardTile[9])
       || (boardTile[1] == boardTile[4] && boardTile[4] == boardTile[7])
       || (boardTile[2] == boardTile[5] && boardTile[5] == boardTile[8])
       || (boardTile[3] == boardTile[6] && boardTile[6] == boardTile[9])
       || (boardTile[1] == boardTile[5] && boardTile[5] == boardTile[9])
       || (boardTile[3] == boardTile[5] && boardTile[5] == boardTile[7]))
   {
       return 1;
   }
   else if (boardTile[1] != '1' && boardTile[2] != '2' && boardTile[3] != '3'
       && boardTile[4] != '4' && boardTile[5] != '5' && boardTile[6] != '6'
       && boardTile[7] != '7' && boardTile[8] != '8' && boardTile[9] != '9')
   {
       return 0;
   }
   else
   {
       return -1;
   }
}

// Draw the board with the player marks
void drawBoard()
{
   system("cls");
   //cout << "\n\n\tTic Tac Toe\n\n";
   cout << "Player 1 has 'X' - Player 2 has 'O'" << endl << endl;
   cout << endl;
   //cout << " | | " << endl;
   cout << " | " << " " << boardTile[1] << " | " << boardTile[2] << " | " << boardTile[3] << " | " << endl;
   cout << " |" << "____|___|___|" << endl;
   //cout << " | | " << endl;
   cout << " | " << " " << boardTile[4] << " | " << boardTile[5] << " | " << boardTile[6] << " | " << endl;
   cout << " |" << "____|___|___|" << endl;
   //cout << " | | " << endl;
   cout << " | " << " " << boardTile[7] << " | " << boardTile[8] << " | " << boardTile[9] << " | " << endl;
   //cout << " | | " << endl << endl;
}

//Check if the player's move is valid or if the tile has already been taken
//TODO: Based on the function initiation at the beginning of the program, write the function signature, make sure the variable names are consistent
bool checkValidMove(int choice)
{
   bool isValid = false;
   char aChar = '0' + choice;
   if (choice > 0 && choice <= 9) {
       if (boardTile[choice] == aChar) {
           isValid = true;
       }
   }

   return isValid;
}

----------------------------------------------------

Output

Player 1 has 'X' - Player 2 has 'O'

| X | O | X |
|____|___|___|
| O | O | X |
|____|___|___|
| 7 | 8 | X |
==>Player 1 wins!