fifteen

/**
 * fifteen.c
 *
 * Computer Science 50
 * Problem Set 3
 *
 * Implements Game of Fifteen (generalized to d x d).
 *
 * Usage: fifteen d
 *
 * whereby the board's dimensions are to be d x d,
 * where d must be in [DIM_MIN,DIM_MAX]
 *
 * Note that usleep is obsolete (verouderd), but it offers more granularity (meer detail) than
 * sleep and is simpler to use than nanosleep; `man usleep` for more.
 */

#define _XOPEN_SOURCE 500

#include <cs50.h> //enables GetString
#include <stdio.h> //enables printf, fprintf
#include <stdlib.h> //
#include <unistd.h> //enables usleep

// constants
#define DIM_MIN 3
#define DIM_MAX 9

// board
int board[DIM_MAX][DIM_MAX];

// dimensions
int d;

// prototypes
void clear(void);
void greet(void);
void init(void);
void draw(void);
bool move(int tile);
bool won(void);

int main(int argc, string argv[])
{
    // ensure proper usage
    if (argc != 2)
    {
        printf("Usage: fifteen d\n");
        return 1;
    }

    // ensure valid dimensions
    d = atoi(argv[1]);
    if (d < DIM_MIN || d > DIM_MAX)
    {
        printf("Board must be between %i x %i and %i x %i, inclusive.\n",
            DIM_MIN, DIM_MIN, DIM_MAX, DIM_MAX);
        return 2;
    }

    // open log
    FILE* file = fopen("log.txt", "w");
    if (file == NULL)
    {
        return 3;
    }

    // greet user with instructions
    greet();

    // initialize the board
    init();

    // accept moves until game is won
    while (true)
    {
        // clear the screen
        clear();

        // draw the current state of the board
        draw();

        // Prints the board and values in log.text
        for (int i = 0; i < d; i++)
        {
            for (int j = 0; j < d; j++)
            {
                fprintf(file, "%i", board[i][j]); //prints the the ciphers on the board
                if (j < d - 1)
                {
                    fprintf(file, "|"); //Prints a stripe throughout the board
                }
            }
            fprintf(file, "\n"); // prints an enter after each row on teh board
        }
        fflush(file); //prints the preceding all at once 'flush'.

        // check for win
        if (won())
        {
            printf("ftw!\n");
            break;
        }

        // prompt for move
        printf("Tile to move: ");
        int tile = GetInt();

        move(tile);

        // log move (for testing)
        fprintf(file, "%i\n", tile);
        fflush(file);

        // move if possible, else report illegality
        if (!move(tile))
        {
            printf("\nIllegal move.\n");
            usleep(500000);
        }

        // sleep thread for animation's sake
        usleep(500000);
    }

    // close log
    fclose(file);

    // success
    return 0;
}

/**
 * Clears screen using ANSI escape sequences.
 */
void clear(void)
{
    printf("\033[2J"); //Clear the screen, move to (0, 0)
    printf("\033[%d;%dH", 0, 0);
}

/**
 * Greets player.
 */
void greet(void)
{
    clear();
    printf("WELCOME TO GAME OF FIFTEEN\n");
    usleep(2000000);
}

/**
 * Initializes the game's board with tiles numbered 1 through d*d - 1
 * (i.e., fills 2D array with values but does not actually print them).
 */
void init(void)
{
int StartValue = d*d - 1;
    // TODO
    for (int i = 0; i < d; i++)
    {
        for (int j = 0; j < d; j++)
        {
            board[i][j] = StartValue;
            StartValue = StartValue -1;
        }
    }
    if ((d * d -1) % 2 != 0) // if odd number of tiles change number 1 and 2
    {
    int temp; //create temporary storage
    temp = board[d-1][d-3]; //puts 2 in temporary storage
    board[d-1][d-3] = board[d-1][d-2]; //puts 1 in place of two
    board[d-1][d-2] = temp; //puts to in place of one
    }
}


/**
 * Prints the board in its current state.
 */
void draw(void)
{
    // TODO
    for (int i = 0; i < d; i++)
    {
        for (int j = 0; j < d; j++)
        {
            if (board[i][j] > 9) //prints one space in combi with 2 digits
            {
                printf(" ");
            }
            if (board[i][j] < 10) //prints two spaces in combi with one digit
            {
                printf("  ");
            }
            if (board[i][j] == 0) //prints 3 spaces and no zero if digit is zero
            {
            printf("   ");
            }
            else
            {
            printf("%d",board[i][j]); //prints every digit except the zero
            }
        }
    printf("\n");
    }

}

/**
 * If tile borders empty space, moves tile and returns true, else
 * returns false.
 */
bool move(int tile)
{
    // TODO
    //if (board[m][n] == 0)  //checks the array for the number zero
    int temp;

    if (tile == 0)
    {
        return false;
    }
    for (int row = 0; row < d; row++)
    {
        for (int column = 0; column < d; column++)
        {
            if (tile == board[row][column]) //checks array for tile
            {

                if (column > 0) //makes sure C does not acces any space to the left of 2D-array
                {
                    if (board[row-0][column-1] == 0) // checks if blank space is left to tile
                    {
                        temp = tile;     //switch the tiles
                        board[row][column] = board[row-0][column-1];
                        board[row-0][column-1] = temp;
                        return true;
                    }
                }
                if (row > 0) //makes sure C does not access any space above 2D-array
                {
                    if (board[row-1][column-0] == 0) // checks if blank space is above tile
                    {
                        temp = tile;     //switch the tiles
                        board[row][column] = board[row-1][column-0];
                        board[row-1][column-0] = temp;
                        return true;
                    }
                }
                if (column < d-1) //makes sure C does not access any space to the right of 2D-array
                {
                    if (board[row+0][column+1] == 0) // checks if blank space is right to tile
                    {
                        temp = tile;     //switch the tiles
                        board[row][column] = board[row+0][column+1];
                        board[row+0][column+1] = temp;
                        return true;
                    }
                }
                if (row < d-1) //makes sure C does not acces any space underneath 2D-array
                {
                    if (board[row+1][column+0] == 0) // checks if blank space is underneath tile
                    {
                        temp = tile;     //switch the tiles
                        board[row][column] = board[row+1][column+0];
                        board[row+1][column+0] = temp;
                        return true;
                    }
                }
            }
        }
    }
    return false;
}

http://pastebin.com/cjRptJn3