/// <summary>
/// Cpus the move for winning.
/// </summary>
/// <param name="boardPositions">The board positions.</param>
/// <param name="choosingCharacter">The choosing character.</param>
/// <returns> int which gives position of winning of cpu or either blocking of winning of user.</returns>
public static int CpuMoveForWinning(char[] boardPositions, char[] choosingCharacter)
{
//returning the position of winning of cpu.
for (int i = 1; i <= 9; i++)
{
if (boardPositions[i] == ' ')
{
boardPositions[i] = choosingCharacter[1];
if (TicTacToe.CheckingForWinning(boardPositions) == 0)
{
boardPositions[i] = ' ';
return(i);
}
boardPositions[i] = ' ';
}
}
//returning the position where cpu blocks the winning position of user.
for (int j = 1; j <= 9; j++)
{
if (boardPositions[j] == ' ')
{
boardPositions[j] = choosingCharacter[0];
if (TicTacToe.CheckingForWinning(boardPositions) == 0)
{
boardPositions[j] = ' ';
return(j);
}
boardPositions[j] = ' ';
}
}
return(0);
}
/// <summary>
/// Adding the positions in array filled by user and cpu and displaying it on board.
/// </summary>
/// <param name="boardPositions">The board positions.</param>
/// <param name="choosingCharacter">The choosing character.</param>
/// <param name="tossResult">The toss result.</param>
public static void MarkingPositions(char[] boardPositions, char[] choosingCharacter, int tossResult)
{
int checkForWin;
int index = tossResult;
//do while loop moves until game is drawn or any player wins.
do
{
//switches input values between cpu and player one by one. Index value starts from toss result.
switch (index % 2)
{
//input by user.
case 0:
{
Console.WriteLine("Please enter the position between 1 to 9 where you want to fill your character");
while (true)
{
int positionEnteredByUser = Convert.ToInt32(Console.ReadLine());
if (positionEnteredByUser <= 9 && positionEnteredByUser >= 1)
{
//if position in array and board is vacant, character is added.
if (boardPositions[positionEnteredByUser] == ' ')
{
boardPositions[positionEnteredByUser] = choosingCharacter[index % 2];
TicTacToe.Board(boardPositions);
break;
}
else
{
Console.WriteLine("The position is already occupied, please enter position again");
}
}
else
{
Console.WriteLine("Please enter the correct position to fill");
}
}
break;
}
// input done by user.
case 1:
{
//calling CpuMove method which processes input by cpu and enters in array and displays it on board.
TicTacToe.CpuMove(boardPositions, choosingCharacter, index);
break;
}
default:
break;
}
// calling CheckingForWinning method to see if game is ending or not.
checkForWin = TicTacToe.CheckingForWinning(boardPositions);
//if checkForWin ==0, one of the player has win the game.
if (checkForWin == 0)
{
if (index % 2 == 0)
{
Console.WriteLine("You have won the game");
}
else
{
Console.WriteLine("Cpu has won the game");
}
break;
}
index++;
//if checkforWin= -1, than game is neither draw nor won by any player, positions are vacant in board.
} while (checkForWin == -1);
}