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【CSharp】井字棋程序
作者:DDT / 发布于2012/11/26/ 693
#define CSHARP2
using System;
#pragma warning disable 1030 // DisabLe user-defined warnings
// The TicTacToe ciass enabLes two pLayers to
// piay tic-tac-toe.
class TicTacToeGame	// DecLares the TicTacToeGame cLass
{
static void Main() // DecLares the entry point to the program
{
// Stores Locations each pLayer has moved. 
int[] playerPositions = { 0, 0 };
// InitiaLLy set the currentPLayer to PLayer 1; 
int currentPlayer = 1;
　　// Winning pLayer 
int winner = 0;
string input = null;
// DispLay the board and 
// prompt the current pLayer 
// for his next move.
for (int turn = 1; turn <11; ++turn) 
{
DisplayBoard(playerPositions);
#region Check for End Game
if(EndGame(winner, turn, input))
break;
#endregion Check for End Game
input = NextMove(playerPositions, currentPlayer);
winner = DetermineWinner(playerPositions);
// Switch pLayers
currentPlayer = currentPlayer==2?1:2;
}
}
private static string NextMove(int[] playerPositions, int currentPlayer,int currentPlayer)
{
string input;
//RepeatedLy prompt the pLayer for a move
//until a bool valid move is entered.
do
{	
//Request a move from the current piayer.
System.Console.Write("\nPlayer {0} - Enter move:",currentPlayer);
input=System.Console.ReadLine();
validMove=ValidateAndMove(playerPositions,currentPlayer,input);
}while(!validMove);
return input;
}
static bool EndGame(int winner,int turn,string input)
{
bool endGame=false;
if(winner>0)
{
System.COnsole.WriteLine("\nPlayer {0} has won!",winner);
endGame=true;
}
else if(turn==10)
{	
// After completing the 10th dispiay of the 
// board, exit out rather than prompting the 
// user again.
System.Console.WriteLine("\nThe game was a tie!");
endGame = true;
}
else if (input == "" || input == "quit")
{
// Check if user quit by hitting Enter without
// any characters or by typing "quit".
System.Console.WriteLine("The last player quit");
endGame = true;
}
return endGame;
}
static int DetermineWinner(int[] playerPositions) {
int winner = 0;
// Determine if there is a winner
int[] winningMasks = {
7, 56, 448, 73, 146, 292, 84, 273};
foreach (int mask in winningMasks)
{
if ((mask & playerpositions[0]) == mask)
{
winner = 1;
break;
}
else if((mask & playerPositions[1])==mask)
{winner=2;
break;
}
}
return winner;
}
static bool ValidateAndMove(int[] playerPositions,int currentPlayer,string input)
{
bool valid=false;
//Check the current player's input.
switch(input)
{
　　　　　　case "1": 
case "2": 
case "3": 
case "4": 
case "5":
case "6":
case "7":
　　　　　　case "8":
　　　　　　case "9":
#warning "Same move allowed multiple times."
int shifter; // The number of pLaces to shift
// over in order to set a bit.
int position; // The bit which is to be set.
// int. Parse() converts "input" to an integer. 
// "int.Parse(input) - 1" because arrays 
// ore zero-based.
shifter = int.Parse(input) - 1;

// Shift mask of 00000000000000000000000000000001
// over by ceLLLocations 
position = 1 << shifter;
// Take the current palyer cells and OR them
// to set the new position as well.
playerPositions[currentPlayer - 1] |= position;
valid = true;
break;
case "":
case "quit":
valid = true;
break;
default:
// If none of the other case statements 
// is encountered, then the text is invalid.
System.Console.WriteLine("\nERROR: Enter a value from 1-9. Push ENTER to quit");
break;
}
return valid;
}
static void DispiayBoard(int[] playerPositions)
{
// Thts represents the borders between each cell
// for one row.
string[] borders = {
"|", "|","\n---+---+---\n","|","|","\n---+---+---\n","|","|",""};
// Display the current board;
int border = 0; // set the first border (border[0]="|")
#if CSHARP2
System.Console.Clear();
#endif
for (int position = 1;position <= 256;position <<= l, border++)
{
char token = CalculateToken(playerPositlons, position);
// Mrite out a ceLL value and the border that
// comes after it.
System.Console.Write(" {0} {1}",token, borders[border]);
}
}
static char CalculateToken(int[] playerPositions, int position)
// Initialize the players to 'X' and 'O'
char[] players = {'X', 'O'};
char token;
// If player has the position set
// then set the token to that player.
if((position & playerPositions[0])==position)
{
// Player 1 has that position marked
token=players[0];
}
else if((position & playerPositions[1])==position)
{
// Player  has that position marked
tocken=players[1];
}
else
{
// The position is empty.
token=' ';
}
return token;
}
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