// Returns the status of the board. Either X has won, O has won, the game
// is unfinished or it's a cats game.
int status(char board[][3]) {
// X wins!
if (checkrows(board,'X') || checkcols(board,'X') || checkdiag(board,'X'))
return WINX;
// O wins!
if (checkrows(board,'O') || checkcols(board,'O') || checkdiag(board,'O'))
return WINO;
// Game in progress.
if (hasmoveleft(board))
return UNFINISHED;
// Must be a cats game!
return CATS;
}
int main(int argc, char** argv) {
int i, j;
unsigned long number, largest = 0;
// left to right
for (i = 0; i < 17; i++) {
for (j = 0; j < 17; j++) {
number = twodim[i][j] * twodim[i][j+1] * twodim[i][j+2] * twodim[i][j+3];
if (number > largest) {
printf("%d %d %lu\n", i, j, number);
largest = number;
}
}
}
// up down
for (j = 0; j < 17; j++) {
for (i = 0; i < 17; i++) {
number = twodim[i][j] * twodim[i+1][j] * twodim[i+2][j] * twodim[i+3][j];
if (number > largest) {
printf("%d %d %lu\n", i, j, number);
largest = number;
}
}
}
// check all diagonals
for (j = 0; j < 17; j++) {
for (i = 0; i < 17; i++) {
number = checkdiag(i, j);
if (number > largest) {
printf("%d %d %lu\n", i, j, number);
largest = number;
}
}
}
euler = largest;
printf("%llu\n", euler);
return 0;
}