Answer to Question #281312 in C++ for Mohsin

Question

Write a function that determines who has won a game of tic-tac-toe. The function should receive a character array containing the moves of tic-tac-toe game as given below. first check all rows to see whether one player occupies all the cells in one row, next check all columns, and then check the two diagonals. The function should return a value of 1, 0, -1 in case player 1 wins, draw and player 2 wins, respectively. Assume player 1 marks ‘o’ and player 2 marks ‘x’. Assume, the position for no-move contains ‘ ’ (space character). 

Answer 1

int checkWinner()
{
    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;
}