// Based on the board information determine the next step.
private int makeAMove(Board board, int kkk)
{
// Loop that checks for 2 in a row
for (int i = 1; i <= 7; i = i + 3)
{
if (board.getPlace(i) == board.getPlace(i + 1) && board.getPlace(i) == kkk && board.getPlace(i + 2) == -1)
{
return(i + 2);
}
else if (board.getPlace(i) == board.getPlace(i + 2) && board.getPlace(i) == kkk && board.getPlace(i + 1) == -1)
{
return(i + 1);
}
else if (board.getPlace(i + 1) == board.getPlace(i + 2) && board.getPlace(i + 1) == kkk && board.getPlace(i) == -1)
{
return(i);
}
}
// Loop that checks for 2 in a column
for (int i = 1; i <= 3; i = i + 1)
{
if (board.getPlace(i) == board.getPlace(i + 3) && board.getPlace(i) == kkk && board.getPlace(i + 6) == -1)
{
return(i + 6);
}
else if (board.getPlace(i) == board.getPlace(i + 6) && board.getPlace(i) == kkk && board.getPlace(i + 3) == -1)
{
return(i + 3);
}
else if (board.getPlace(i + 3) == board.getPlace(i + 6) && board.getPlace(i + 3) == kkk && board.getPlace(i) == -1)
{
return(i);
}
}
// Check the first diagonal
if (board.getPlace(1) == board.getPlace(5) && board.getPlace(1) == kkk && board.getPlace(9) == -1)
{
return(9);
}
else if (board.getPlace(1) == board.getPlace(9) && board.getPlace(1) == kkk && board.getPlace(5) == -1)
{
return(5);
}
else if (board.getPlace(5) == board.getPlace(9) && board.getPlace(5) == kkk && board.getPlace(1) == -1)
{
return(1);
}
// Check the second diagonal
if (board.getPlace(3) == board.getPlace(5) && board.getPlace(3) == kkk && board.getPlace(7) == -1)
{
return(7);
}
else if (board.getPlace(3) == board.getPlace(7) && board.getPlace(3) == kkk && board.getPlace(5) == -1)
{
return(5);
}
else if (board.getPlace(5) == board.getPlace(7) && board.getPlace(5) == kkk && board.getPlace(3) == -1)
{
return(3);
}
return(-1);
}
// The computer stratagy for the game.
// Every round the computer has a different technique.
public void strategy(Board board, int turn)
{
Console.WriteLine("OK...let me think");
// The compuer is starting first
if (this.isFirst)
{
if (turn == 1)
{
board.setPlace(5, num);
}
else if (turn == 3)
{
if (board.isNotTaken(1))
{
board.setPlace(1, num);
path = 1;
}
else if (board.isNotTaken(3))
{
board.setPlace(3, num);
path = 2;
}
}
else if (turn == 5)
{
// Always check first if can win
// If the compuer can't win check if the player can win and if he can block him.
int canWin = makeAMove(board, this.num);
int block = makeAMove(board, this.enemyNum);
if (canWin != -1)
{
board.setPlace(canWin, num);
}
else if (block != -1)
{
board.setPlace(block, num);
}
// If the compuer or the player can't win. put in random spot
// contains the path that started last turn.
else
{
if (path == 1)
{
if (board.isNotTaken(2) && board.isNotTaken(8) && board.isNotTaken(3))
{
board.setPlace(2, num);
}
else if (board.isNotTaken(4) && board.isNotTaken(6) && board.isNotTaken(7))
{
board.setPlace(4, num);
}
}
else if (path == 2)
{
if (board.isNotTaken(2) && board.isNotTaken(8) && board.isNotTaken(1))
{
board.setPlace(2, num);
}
else if (board.isNotTaken(6) && board.isNotTaken(4) && board.isNotTaken(9))
{
board.setPlace(6, num);
}
}
}
}
else if (turn == 7)
{
// Always check first if can win
// If the compuer can't win check if the player can win and if he can block him.
int canWin = makeAMove(board, this.num);
int block = makeAMove(board, this.enemyNum);
if (canWin != -1)
{
board.setPlace(canWin, num);
}
else if (block != -1)
{
board.setPlace(block, num);
}
// If the compuer or the player can't win. put in random spot
else
{
for (int i = 0; i < 9; i++)
{
if (board.getPlace(i + 1) == -1)
{
board.setPlace(i + 1, num);
break;
}
}
}
}
else if (turn == 9)
{
// Fill in the only place that got left
for (int i = 0; i < 9; i++)
{
if (board.getPlace(i + 1) == -1)
{
board.setPlace(i + 1, num);
}
}
}
}
// The compuer is starting second
else
{
// Try to get the center, if its already taken, choose a path
if (turn == 2)
{
if (board.isNotTaken(5))
{
board.setPlace(5, num);
}
else
{
if (board.isNotTaken(1))
{
board.setPlace(1, num);
path = 1;
}
else if (board.isNotTaken(3))
{
board.setPlace(3, num);
path = 2;
}
}
}
else if (turn == 4)
{
// Check if the player can win and if he can block him.
int block = makeAMove(board, this.enemyNum);
if (block != -1)
{
board.setPlace(block, num);
}
else
{
if (path == 1)
{
if (board.isNotTaken(2) && board.isNotTaken(3))
{
board.setPlace(3, num);
}
else if (board.isNotTaken(4) && board.isNotTaken(7))
{
board.setPlace(7, num);
}
}
else if (path == 2)
{
if (board.isNotTaken(1) && board.isNotTaken(2))
{
board.setPlace(1, num);
}
else if (board.isNotTaken(6) && board.isNotTaken(9))
{
board.setPlace(9, num);
}
}
}
}
else if (turn == 6)
{
// Always check first if can win
// If the compuer can't win check if the player can win and if he can block him.
int canWin = makeAMove(board, this.num);
int block = makeAMove(board, this.enemyNum);
if (canWin != -1)
{
board.setPlace(canWin, num);
}
else if (block != -1)
{
board.setPlace(block, num);
}
else
{
for (int i = 0; i < 9; i++)
{
if (board.getPlace(i + 1) == -1)
{
board.setPlace(i + 1, num);
break;
}
}
}
}
else if (turn == 8)
{
// Always check first if can win
// If the compuer can't win check if the player can win and if he can block him.
int canWin = makeAMove(board, this.num);
int block = makeAMove(board, this.enemyNum);
if (canWin != -1)
{
board.setPlace(canWin, num);
}
else if (block != -1)
{
board.setPlace(block, num);
}
else
{
for (int i = 0; i < 9; i++)
{
if (board.getPlace(i + 1) == -1)
{
board.setPlace(i + 1, num);
break;
}
}
}
}
}
}
// Check for winners, checks for a full row/ cole or diagonal
private static bool checkForWinners()
{
// Loop that checks for 3 in a row
for (int i = 1; i <= 7; i = i + 3)
{
if (board.getPlace(i) == board.getPlace(i + 1) && board.getPlace(i + 1) == board.getPlace(i + 2) && board.getPlace(i) != -1)
{
DetermineTheWinner(board.getPlace(i));
return(true);
}
}
// Loop that checks for 3 in a column
for (int i = 1; i <= 3; i = i + 1)
{
if (board.getPlace(i) == board.getPlace(i + 3) && board.getPlace(i + 3) == board.getPlace(i + 6) && board.getPlace(i) != -1)
{
DetermineTheWinner(board.getPlace(i));
return(true);
}
}
// Check the first diagonal
if (board.getPlace(1) == board.getPlace(5) && board.getPlace(5) == board.getPlace(9) && board.getPlace(1) != -1)
{
DetermineTheWinner(board.getPlace(1));
return(true);
}
// Check the second diagonal
if (board.getPlace(3) == board.getPlace(5) && board.getPlace(5) == board.getPlace(7) && board.getPlace(3) != -1)
{
DetermineTheWinner(board.getPlace(3));
return(true);
}
return(false);
}
