Untitled

#include <iostream>
#define ROW 10
#define COL 10
using namespace std;

void display_board();
void populate();
void checkDiag(char [][COL], int, int);
void checkSides(char [][COL], int, int);
bool checkNull(char [][COL]);

int main() {
    int option;

    do {
        populate();
        cout << "Anoter configuration?" << endl;
        cout << "1) Yes" << endl << "2) Quit" << endl;
        cin >> option;
    } while (option != 2);

    system("pause");
    return 0;
}

void display_board(char chessBoard[][COL]) {

    for (int i=0; i < ROW; i++) {
        for (int j=0; j< COL; j++) {
            cout << "|_" << chessBoard[i][j] << "_| ";
        }
        cout << endl;
    }
}


void populate() { // Placing the first queen.
    static char chessBoard[ROW][COL];
    int x, y;

    do {
        srand(time(NULL)); // random position
        x = rand()%COL;
        y = rand()%ROW;
        while (chessBoard[x][y] != 'Q' && chessBoard[x][y] != 'x') {
            chessBoard[x][y] = 'Q';
        } // queen
        checkSides(chessBoard, x, y); // fills horizontal/vertical with Xs
        checkDiag(chessBoard, x, y); // diagonal checks
        checkNull(chessBoard);
    } while (checkNull);
    display_board(chessBoard); // displays the board
}


// Checks if there's an empty space in the chessboard
bool checkNull(char chessBoard[][COL]) {
    bool isFilled = false;
    for (int i = 0; i < ROW; i++) {
        for (int j = 0; j < COL; j++) {
            if (chessBoard[i][j] != NULL) {
                isFilled = true;
                break;
            }// if
        }// for j
    }// for i
    return isFilled;
}


void checkSides(char chessBoard[][COL], int x, int y) {
    for (int i =0; i < ROW; i++) {
        if (chessBoard[i][y] != 'Q' && chessBoard[i][y] == NULL) {
            chessBoard[i][y] = 'x'; //vertical
        }
    }
    for (int i=0; i < COL; i++) {
        if (chessBoard[x][i] != 'Q' && chessBoard[x][i] == NULL) {
            chessBoard[x][i] = 'x'; // horizontal
        }
    }
}

void checkDiag(char chessBoard[][COL], int x, int y) {
    for (int i = 0 ; i < 10; i++) {
        if (chessBoard[x+i][y+i] == NULL && chessBoard[x+i][y+i] != 'Q')
            chessBoard[x+i][y+i] = 'x';

        if (chessBoard[x+i][y-i] == NULL && chessBoard[x+i][y-i] != 'Q')
            chessBoard[x+i][y-i] = 'x';

        if (chessBoard[x-i][y-i] == NULL && chessBoard[x+i][y-i] != 'Q')
            chessBoard[x-i][y-i] = 'x';

        if (chessBoard[x-i][y+i] == NULL && chessBoard[x-i][y+i] != 'Q')
            chessBoard[x-i][y+i] = 'x';   // diagonal X
    }
}