The assignment is to make a two player tic-tac-toe game. Here's what I have so far:

When I test it, it works the first time. But after that it doesn't. But I can't figure out why.Code:char board[9] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'}, choice; int index=0, player = 1, result; bool found = false; do{ if (player == 1){ do{ cout << "Player one make your move.\n"; cin >> choice; cout << "\n"; index = 0; while ((!found) && (index < 9)){ if (choice == board[index]){ found = true; board[index] = 'X'; } else index++; } if(!found) cout << "Illegal move.\n\n"; }while(!found); index = 0; if (board[index]==board[index+1] && board[index+1]==board[index+2]) result = 1; else if(board[index+3]==board[index+4] && board[index+4]==board[index+5]) result = 1; else if(board[index+6]==board[index+7] && board[index+7]==board[index+8]) result = 1; else if(board[index]==board[index+3] && board[index+3]==board[index+6]) result = 1; else if(board[index+1]==board[index+4] && board[index+4]==board[index+7]) result = 1; else if(board[index+2]==board[index+5] && board[index+5]==board[index+8]) result = 1; else if(board[index]==board[index+4] && board[index+4]==board[index+8]) result = 1; else if(board[index+6]==board[index+4] && board[index+4]==board[index+2]) result = 1; else result = -1; if (result == 1) cout << "Player one wins!\n"; for (index = 0; index < 9; index++){ cout << board[index] << ' '; if (index == 2 || index == 5 || index == 8) cout << "\n"; } cout << "\n\n"; player++; } else if (player == 2){ do{ cout << "Player two make your move.\n"; cin >> choice; cout << "\n"; index = 0; while ((!found) && (index < 9)){ if (choice == board[index]){ found = true; board[index] = 'O'; } else index++; } if(!found) cout << "Illegal move.\n\n"; }while(!found); index = 0; if (board[index]==board[index+1] && board[index+1]==board[index+2]) result = 1; else if(board[index+3]==board[index+4] && board[index+4]==board[index+5]) result = 1; else if(board[index+6]==board[index+7] && board[index+7]==board[index+8]) result = 1; else if(board[index]==board[index+3] && board[index+3]==board[index+6]) result = 1; else if(board[index+1]==board[index+4] && board[index+4]==board[index+7]) result = 1; else if(board[index+2]==board[index+5] && board[index+5]==board[index+8]) result = 1; else if(board[index]==board[index+4] && board[index+4]==board[index+8]) result = 1; else if(board[index+6]==board[index+4] && board[index+4]==board[index+2]) result = 1; else result = -1; if (result == 1) cout << "Player two wins!\n"; for (index = 0; index < 9; index++){ cout << board[index] << ' '; if (index == 2 || index == 5 || index == 8) cout << "\n"; } cout << "\n\n"; player--; } }while (result != 1);

Here's the out put:

Any help would be appreciated.Code:Welcome to Tic-Tac-Toe! Player 1 is 'X' and Player 2 is 'O'. a b c d e f g h i Choose a spot by entering the corresponding letter. Player one make your move. e a b c d X f g h i Player two make your move. a a b c d X f g h i Player one make your move. i a b c d X f g h i Player two make your move. e a b c d X f g h i Player one make your move.