I need help building a Tic Tac Toe game using C++. The requirements are: 1 . Val

Question

I need help building a Tic Tac Toe game using C++. The requirements are:

1. Validate user input at every opportunity.
a. Do not allow number entries less than 0
b. Do not allow number entries greater than 8
c. Do not allow non-numeric entries
2. Do not use global variables in the development of the program
3. You may use global constants in the development of the program
4. Use one-dimensional arrays to keep track of the game:
a. Computer moves
b. Human moves
5. Use functions to pass arrays and implement other program requirements.
6. The program must be developed using functions so that the main() function consists mostly of function calls
7. The main() function must use a loop to keep the user in the program until he/she wants to quit.
8. The program prompts users for their names and ensures (validates) that they are.

Explanation / Answer

#include BITMAP *xSprite; BITMAP *oSprite; int board[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0}; //This will be used to keep //track of the Xs and Os int curSquare = 0; //This will keep track of the current square //the selector is on int turn = 1; //This will keep track of whose turn it is //1 Will be for X and 2 for O int x = 0; //X and Y position of selector int y = 0; int tempX = 0; //holds temporary values used to clear selector int tempY = 0; void setupBoard(){ //This function will draw in the grid acquire_screen(); line( screen, 200, 0, 200, 480, makecol( 255, 255, 255)); line( screen, 400, 0, 400, 480, makecol( 255, 255, 255)); line( screen, 0, 150, 680, 150, makecol( 255, 255, 255)); line( screen, 0, 300, 680, 300, makecol( 255, 255, 255)); rect( screen, x+1, y+1, x + 199, y + 149, makecol( 255, 255, 0)); release_screen(); } void updateBoard(){ //draws in selector rect( screen, tempX+1, tempY+1, tempX + 199, tempY + 149, makecol( 0, 0, 0)); rect( screen, x+1, y+1, x + 199, y + 149, makecol( 255, 255, 0)); rest(100); } void announceWinner(){ //Announces the winner if( turn == 1){ textout_ex( screen, font, "X Wins!!!!", 300, 240, makecol( 255, 0, 0), makecol(0, 0, 0)); } else { textout_ex( screen, font, "O Wins!!!!", 300, 240, makecol( 255, 0, 0), makecol(0, 0, 0)); } } void checkWin(){ //checks for a winner if( board[0] == turn && board[1] == turn && board[2] == turn){ announceWinner(); } else if( board[0] == turn && board[3] == turn && board[6] == turn){ announceWinner(); } else if( board[0] == turn && board[4] == turn && board[8] == turn){ announceWinner(); } else if( board[1] == turn && board[4] == turn && board[7] == turn){ announceWinner(); } else if( board[2] == turn && board[4] == turn && board[6] == turn){ announceWinner(); } else if( board[2] == turn && board[5] == turn && board[8] == turn){ announceWinner(); } else if( board[3] == turn && board[4] == turn && board[5] == turn){ announceWinner(); } else if( board[6] == turn && board[7] == turn && board[8] == turn){ announceWinner(); } } void drawXO(){ //draws in the X and O acquire_screen(); if(turn == 1){ draw_sprite( screen, xSprite, x, y); board[curSquare] = 1; checkWin(); ++turn; } else if( turn == 2){ draw_sprite( screen, oSprite, x, y); board[curSquare] = 2; checkWin(); --turn; } release_screen(); rest(100); } void moveBox(){ //takes input clear_keybuf(); tempX = x; tempY = y; if( key[KEY_UP] && y != 0){ y -= 150; curSquare -=3; updateBoard(); } else if( key[KEY_DOWN] && y != 300){ y += 150; curSquare +=3; updateBoard(); } else if( key[KEY_RIGHT] && x != 400){ x += 200; ++curSquare; updateBoard(); } else if( key[KEY_LEFT] && x != 0){ x -= 200; --curSquare; updateBoard(); } else if( key[KEY_ENTER] && board[curSquare] == 0){ drawXO(); } } int main(){ allegro_init(); install_keyboard(); set_color_depth(16); set_gfx_mode( GFX_AUTODETECT, 640, 480, 0, 0); xSprite = load_bitmap( "x.bmp", NULL); oSprite = load_bitmap( "o.bmp", NULL); setupBoard(); while( !key[KEY_ESC]){ moveBox(); } destroy_bitmap( xSprite); destroy_bitmap( oSprite); return 0; } END_OF_MAIN();

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