Editing a tic tac toe program.

[airguitarman94]

Hi, below is my program currently. it works fine and everything.

// Include the libraries

#include <iostream>

#include <string>

 

//Use the standard namespace

using namespace std;

 

// Declare global variables

char Board[9];

 

// Declare functions

void showBoard ( );

bool moveIsValid (int m);

int whoWon ( ); //Returns 0 if no one has won, 1 if player 1 has won, and 2 if player 2 has won

 

void main ( )

{

   // Declare local variables

   string Player_1_Name;

   string Player_2_Name;

   int Whose_Turn = 1; // 1 means it's player 1's turn, 2 means it's player 2's turn

   int Move; // Stores where the player wants to move

   int Total_Moves = 0;

 

   //Assign values to the playing board

   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';

 

   // Get player names

   cout << "Player 1: Please enter your name." << endl;

   cin >> Player_1_Name;

   cout << "Player 2: Please enter your name." << endl;

   cin >> Player_2_Name;

 

   while (whoWon ( ) == 0 && Total_Moves < 9)

   {

      // Do this until the player chooses a valid move

      do

      {

         // Show the board

         showBoard ( );

 

         // Tell which player to move

         if (Whose_Turn == 1)

         {

            cout << Player_1_Name << ": It's your turn." << endl;

         }

         else

         {

            cout << Player_2_Name << ": It's your turn." << endl;

         }

         // Get the move

         cout << "Enter the number of the spot where you'd like to move." << endl;

         cin >> Move;

      } while (moveIsValid (Move) != true);

 

      // Add 1 to Total_Moves

      Total_Moves++;

 

      // Change whose turn it is

      switch (Whose_Turn)

      {

      case (1):

         {

            Board[Move] = 'x';

            Whose_Turn = 2;

            break;

         }

      case (2):

         {

            Board[Move] = 'o';

            Whose_Turn = 1;

         }

      }

   }

   // Show the board

   showBoard ( );

 

   if (whoWon ( ) == 1)

   {

      cout << Player_1_Name << " has won the game!" << endl;

   }

   else if (whoWon ( ) == 2)

   {

      cout << Player_2_Name << " has won the game!" << endl;

   }

   else

   {

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

   }

 

   system ("PAUSE");

}

 

void showBoard ( )

{

   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;

   cout << endl;

}

 

bool moveIsValid (int m)

{

   if (Board[m] != 'x' && Board[m] != 'o')

   {

      return true;

   }

   else

   {

      return false;

   }

}

 

int whoWon ( )

{

   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;

      }

   }

   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;

      }

   }

   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;

      }

   }

   return 0;

}

I need to make it so that instead of a player two, the computer plays for player two, and puts in a random number to act as a second player. I don't want to change my original code to drastically, but i understand that i will need to in order for me to get the computer to play instead of a second person.

Thank you!

[ultifinitus]

Looks like you really don't have to change much at all! Well done, it's always nice to have easily expandable programs.

In your case I'd look at the following lines:

  cout << "Player 2: Please enter your name." << endl;

   cin >> Player_2_Name;

//check if "computer" was typed in either of these, or both of these (see movie, war games) 

and here

//Here, check on computer's and humans, if the current turn is a computer add a function to move here, else
//do what you're already doing.

if (Whose_Turn == 1)

         {

            cout << Player_1_Name << ": It's your turn." << endl;

         }

         else

         {

            cout << Player_2_Name << ": It's your turn." << endl;

         }

         // Get the move

         cout << "Enter the number of the spot where you'd like to move." << endl;

         cin >> Move;

easy peasy =)

[airguitarman94]

thanks! so you're saying make it so that if the person types "computer" as a person, the computer will play as the second player? ok... what's the best way to go about doing that??

[ultifinitus]

I was actually thinking you could type "computer" on either player, and that person will turn into one, so you can even have computer vs computer.

Well make two bool variables (the best thing to do would probably be to make a custom "player" class with a computer flag) and if it's a computer set the bool = to true;

In the player's move section, check for which player is currently moving, and if it's a computer make a move, if it's not, get input and make a move that way.

[airguitarman94]

i'm kind of following... but not totally.