// Pre-condition: board is in a valid configuration for a tic-tac-toe game,
// right after piece just moved.
// Post-condition: A score will be returned corresponding to the score of
// piece's position in the current board.
int score(char board[][3], char piece) {
// Figure out the status now.
int curstatus = status(board);
int nextmove, answer;
// If the game is over, we can easily return our answer.
if (curstatus == WINX && piece == 'X')
return WIN;
if (curstatus == WINO && piece == 'O')
return WIN;
if (curstatus == WINX && piece == 'O')
return LOSS;
if (curstatus == WINO && piece == 'X')
return LOSS;
if (curstatus == CATS)
return TIE;
// Otherwise, assume the opponents move will be the one the computer
// selects.
nextmove = compmove(board, other(piece));
// Place this new move on the board.
board[nextmove/3][nextmove%3] = other(piece);
// Return the OPPOSITE score, since this time, the score function will be
// scoring our opponent!
answer = -score(board, other(piece));
// Restore the board to what it looked like before.
board[nextmove/3][nextmove%3] = '_';
return answer;
}
static unsigned makemove (enum EPlayer player)
{
if (player == USER)
return usermove();
else {
unsigned m = compmove();
_asked[COMPUTER][m] = true;
wattron (_wmsg, A_BOLD);
wprintw (_wmsg, "I ask you for %s. ", c_CardNames[m]);
wattroff (_wmsg, A_BOLD);
return m;
}
}
int
main(int argc, char *argv[])
{
int ch, move;
while ((ch = getopt(argc, argv, "ph")) != -1)
switch(ch) {
case 'p':
promode = 1;
break;
case '?':
case 'h':
default:
usage();
}
srandomdev();
instructions();
init();
if (nrandom(2) == 1) {
printplayer(COMPUTER);
(void)printf("get to start.\n");
goto istart;
}
printplayer(USER);
(void)printf("get to start.\n");
for (;;) {
move = usermove();
if (!comphand[move]) {
if (gofish(move, USER, userhand))
continue;
} else {
goodmove(USER, move, userhand, comphand);
continue;
}
istart: for (;;) {
move = compmove();
if (!userhand[move]) {
if (!gofish(move, COMPUTER, comphand))
break;
} else
goodmove(COMPUTER, move, comphand, userhand);
}
}
/* NOTREACHED */
}
// Executes a move for the player specified by the second parameter and
// reflects those changes on the board.
void domove(char board[][3], char player) {
int done = 0;
int r, c, temp;
// Continue until a move has been executed.
while (!done) {
// Human player is X.
if (player == 'X') {
// Prompt for and read in the player's move.
printf("\nHere is the current board:\n");
printboard(board);
printf("\nEnter your move, player %c.\n", player);
printf("Enter the row(0-2) followed by a space and the col(0-2).\n");
scanf("%d%d", &r, &c);
}
// Computer Player is O
else {
// Get the computer's move, split into row&col and print it.
temp = compmove(board, player);
r = temp/3;
c = temp%3;
printf("\nThe computer has chosen to take square %d, %d.\n", r, c);
}
// Check for invalid indexes.
if (r<0 || r>2 || c<0 || c>2)
printf("Sorry, that is not a valid square.\n");
// Check for a taken square.
else if (board[r][c] != '_')
printf("Sorry, that square has been taken already.\n");
// Execute the move.
else {
board[r][c] = player;
done=1;
}
} // end while loop
}
int main(int argc, char *argv[]) {
/* Seed randomness. */
srand(time(NULL) ^ getpid());
bake_args(argc, argv);
initgame();
do {
if(thegame.players == 1)
whatside();
else
player = X;
thegame.restart = false;
cleargame();
while(thegame.running) {
if(thegame.players == 0) {
printboard(false);
compmove(player);
if(checkwinner())
break;
compmove(-player);
}
else if(thegame.players == 1) {
if(player == X){
printboard(true);
makemove(player);
if(checkwinner())
break;
compmove(-player);
}
else {
compmove(-player);
if(checkwinner())
break;
printboard(true);
makemove(player);
}
}
else {
printboard(true);
makemove(player);
player = -player;
}
checkwinner();
}
printwinner();
restart();
} while(thegame.restart);
/* we so funny */
if(thegame.players == 0)
wargames();
return 0;
}