Tic Tac Toe Game Coding in C++ language

Program:


#include <iostream.h>
#include <conio.h>

char square[10] = {'0','1','2','3','4','5','6','7','8','9'};

int checkwin();   //declaration of method checkwin which return an int type
void board();     //declaration of method board which returns nothing i.e. void

int main()         //calls your main method
{
int player = 1,i,choice;

char mark;
do
{
clrscr();
board();    //board method called
player=(player%2)?1:2;

cout << "Player " << player << ", enter a number:  ";
cin >> choice;

mark=(player == 1) ? 'X' : 'O';

if (choice == 1 && square[1] == '1')

square[1] = mark;
else if (choice == 2 && square[2] == '2')

square[2] = mark;
else if (choice == 3 && square[3] == '3')

square[3] = mark;
else if (choice == 4 && square[4] == '4')

square[4] = mark;
else if (choice == 5 && square[5] == '5')

square[5] = mark;
else if (choice == 6 && square[6] == '6')

square[6] = mark;
else if (choice == 7 && square[7] == '7')

square[7] = mark;
else if (choice == 8 && square[8] == '8')

square[8] = mark;
else if (choice == 9 && square[9] == '9')

square[9] = mark;
else
{
cout<<"Invalid move ";

player--;
cin.ignore();
cin.get();
}
i=checkwin();   // checkwin method called & the value returned by chechwin
                                        // method is stored in variable i
player++;
}while(i==-1);
clrscr();
board();     //board method called
if(i==1)

cout<<"==>\aPlayer "<<--player<<" wins!";
else
cout<<"==>\aGame is drawn!";

cin.ignore();
cin.get();
return 0;
}

/*********************************************

FUNCTION TO RETURN GAME STATUS
1 FOR GAME IS OVER WITH RESULT
-1 FOR GAME IS IN PROGRESS
O GAME IS OVER AND NO RESULT
**********************************************/

int checkwin()         // definitions for implementing checkwin method
{
if (square[1] == square[2] && square[2] == square[3])

return 1;
else if (square[4] == square[5] && square[5] == square[6])

return 1;
else if (square[7] == square[8] && square[8] == square[9])

return 1;
else if (square[1] == square[4] && square[4] == square[7])

return 1;
else if (square[2] == square[5] && square[5] == square[8])

return 1;
else if (square[3] == square[6] && square[6] == square[9])

return 1;
else if (square[1] == square[5] && square[5] == square[9])

return 1;
else if (square[3] == square[5] && square[5] == square[7])

return 1;
else if (square[1] != '1' && square[2] != '2' && square[3] != '3'
                    && square[4] != '4' && square[5] != '5' && square[6] != '6'
                  && square[7] != '7' && square[8] != '8' && square[9] != '9')

return 0;
else
return -1;
}


/*******************************************************************
     FUNCTION TO DRAW BOARD OF TIC TAC TOE WITH PLAYERS MARK
********************************************************************/


void board()          // definitions for implementing board method
{

cout << "\n\n\tTic Tac Toe\n\n";

cout << "Player 1 (X)  -  Player 2 (O)" << endl << endl;
cout << endl;

cout << "     |     |     " << endl;
cout << "  " << square[1] << "  |  " << square[2] << "  |  " << square[3] << endl;

cout << "_____|_____|_____" << endl;
cout << "     |     |     " << endl;

cout << "  " << square[4] << "  |  " << square[5] << "  |  " << square[6] << endl;

cout << "_____|_____|_____" << endl;
cout << "     |     |     " << endl;

cout << "  " << square[7] << "  |  " << square[8] << "  |  " << square[9] << endl;

cout << "     |     |     " << endl << endl;
}

/*******************************************************************
END OF CODE
********************************************************************/





Output:







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