Question

C program. librarys that are in use; stdio.h, stdlib.h, time.h, stddef.h, ctype.h, math.h, string.h.

Need to rewrite the functions linked in the code: "return add_move_lib ( board, col, colour ) ;" "return board_full_lib ( board ) ;" "return display_board_lib ( board ) ;

// TASKS

// board_full() display_board() add_move()

// adds a token of the given value (1 or 2) to the board at the

// given column (col between 1 and COLS inclusive)

// Returns 0 if successful, -1 otherwise

int add_move ( int board[COLS][ROWS], int col, int colour )

{

// check that the column isn't full - if it is, return -1 and abort

// start at the bottom of the board, and move upwards in the specified column until an empty spot is found

// put a token of the specified colour at that location

return add_move_lib ( board, col, colour ) ;

}

// determines if the board is completely full or not.

// Return TRUE if full, false otherwise

int board_full ( int board[COLS][ROWS] ){

// loop through each column

// if a column ISN'T full, return 0 (board can't be full if a single column isn't

// if all columns are checked and full, return 1

return board_full_lib ( board ) ;

}

// displays the board to the screen

int display_board ( int board[COLS][ROWS] ){

// loop through each row and column of the board and display in appropriate format

// use | and - characters to draw boundaries of the board, and put numbers at the bottom to indicate the column numbers

return display_board_lib ( board ) ;

}

Answer 1

// adds a token of the given value (1 or 2) to the board at the

// given column (col between 1 and COLS inclusive)

// Returns 0 if successful, -1 otherwise

int add_move ( int board[COLS][ROWS], int col, int colour )

{

// check that the column isn't full - if it is, return -1 and abort

// start at the bottom of the board, and move upwards in the specified column until an empty spot is found

// put a token of the specified colour at that location

return add_move_lib ( board, col, colour ) ;

}

// helper function to add a token of the given value (1 or 2) to the board at the given column

int add_move_lib ( int board[COLS][ROWS], int col, int colour )

{

       // check if valid column

       if(col < 1 || col > COLS)

       {

             return -1;

       }else

       {

             int i;

             // get the first empty spot from bottom

             for(i=ROWS;i>0;i--)

             {

                    if((board[col][i] != 1) && (board[col][i] != 2))

                    {

                           board[col][i] = colour;

                           return 0;

                    }

             }

             return -1; // non-empty column

       }

}

// determines if the board is completely full or not.

// Return TRUE if full, false otherwise

int board_full ( int board[COLS][ROWS] ){

// loop through each column

// if a column ISN'T full, return 0 (board can't be full if a single column isn't

// if all columns are checked and full, return 1

return board_full_lib ( board ) ;

}

// helper function to check if board is empty or not

int board_full_lib ( int board[COLS][ROWS] )

{

       int i,j;

       for(i=1;i<=COLS;i++)

       {

             for(j=1;j<=ROWS;j++)

                    if((board[i][j] != 1) && (board[i][j] != 2))

                           return 0;

       }

       return 1;

}

// displays the board to the screen

int display_board ( int board[COLS][ROWS] ){

// loop through each row and column of the board and display in appropriate format

// use | and - characters to draw boundaries of the board, and put numbers at the bottom to indicate the column numbers

return display_board_lib ( board ) ;

}

// helper function to display the board on the console

int display_board_lib ( int board[COLS][ROWS] )

{

       int i,j;

       for(i=1;i<=COLS;i++)

       {

             printf("\n|");

             for(j=1;j<=ROWS;j++)

             {

                    if(board[i][j] == 1 || board[i][j] == 2)

                           printf("%d|",board[i][j]);

                    else

                           printf(" |");

             }

             printf("\n");

             if(i < COLS)

             {

                    for(j=0;j<2*ROWS;j++)

                           printf("-");

             }

       }

       return 0;

}