int main()
{
int key;
init_display();
play_again:
reset_game();
display_board(&grid);
play_game();
movecur(15, 9 + brd_h * 2);
textcolour(12);
strout("Game Over! Press ESCAPE to exit or ENTER to play again.");
do {
key = os_wait_for_key();
} while (key != ESC_KEY && key != ENTER_KEY);
if (key == ENTER_KEY) goto play_again;
end_program();
}
char getchar()
{
return os_wait_for_key() & 0x00FF;
}
void play_game()
{
board *b = &grid;
do {
switch (os_wait_for_key()) {
case ESC_KEY:
return;
case UP_KEY:
if (can_move_up(b)) {
shift_up(b);
merge_up(b);
shift_up(b);
add_big_int(&score, &merge_score);
break;
} else {
continue;
}
case DOWN_KEY:
if (can_move_down(b)) {
shift_down(b);
merge_down(b);
shift_down(b);
add_big_int(&score, &merge_score);
break;
} else {
continue;
}
case LEFT_KEY:
if (can_move_left(b)) {
shift_left(b);
merge_left(b);
shift_left(b);
add_big_int(&score, &merge_score);
break;
} else {
continue;
}
case RIGHT_KEY:
if (can_move_right(b)) {
shift_right(b);
merge_right(b);
shift_right(b);
add_big_int(&score, &merge_score);
break;
} else {
continue;
}
default:
continue;
}
add_tile(b);
display_board(b);
} while (!game_is_lost());
}
