The C Programming Language - Pointers

1.8 Programming Example Chessboard
A game is to be developed in which a piece can be moved on a chess board by keyboard
input. A chessboard consists of 8x8 squares (8x8 matrix). The starting position of the
piece is in the field [0][0] and the piece (the number 1) is to be moved with the keys w,
a, s, d (w = up, a = left, s = down, d = right). If the edge of the playing field is crossed,
the character positions itself on the opposite side. The program should end with x.
1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
moving [w = up, a = left, s = down, d = right] (exit with x):
/* example 136 – chessboard */
#include
#include
// Prototypes
void fieldOutput(int *field);
void move(int *field, int *posX, int *posY, char moving);
int main(void)
{
int field[8][8] = { 0 }, posX=0, posY=0;
char moving;
field[posY][posX] = 1;
// set game piece
do {
fieldOutput(&field[0][0]);
printf("\nmoving [w = up, a = left, s = down, d = right] (exit with x): ");
scanf("%c", &moving);
move(&field[0][0], &posX, &posY, moving);
fflush(stdin);
system("Cls");
}while(moving != 'x');
// clear keyboard buffer
// clear screen
}
return 0;
The C Programming Language by Heimo Gaicher – Chapter Pointers 18