更新* 好的，我的代码工作得很好，除了分配的参数让我这样打印语句：
"为玩家 X 输入一行 (0,1,2)："
然后输入一个数字。
"输入玩家 X 的 col (0,1,2)："
然后输入一个数字。
现在我的代码把事情放在了正确的位置，但这就是我的输出的样子：
Who wants to go first (X or O)?
X
Enter a row (0,1,2) for player X:
Enter a column (0,1,2) for player X:
0
1
-------------
| | X | |
-------------
| | | |
-------------
| | | |
-------------
我需要我的代码在每条语句之后选择这样的选项：
Who wants to go first (X or O)?
X
Enter a row (0,1,2) for player X:
0
Enter a column (0,1,2) for player X:
1
-------------
| | X | |
-------------
| | | |
-------------
| | | |
-------------
这是我的代码更新！如何解决这个小错误？我一直在这方面来回走动。
import java.util.*;
public class TicTacMessAroundCode {
//declare constants
public static final int BLANK = 0;
public static final int EX = 1;
public static final int CIRCLE = 2;
// Name-constants to represent the various states of the game
public static final int PLAYING = 0;
public static final int DRAW = 1;
public static final int EX_WON = 2;
public static final int CIRCLE_WON = 3;
// The game board and the game status
public static final int SIZE = 3; //size of each row and each column
public static int[][] board = new int[SIZE][SIZE]; // game board
public static int currentState; // the current state of the game
// (PLAYING, DRAW, EX_WON, CIRCLE_WON)
public static int currentPlayer; // the current player (EX or CIRCLE)
public static int currentRow, currentCol; // current seed's row and column
public static Scanner in = new Scanner(System.in);
/** The entry main method (the program starts here) */
public static void main(String[] args) {
// Initialize the game-board and current status
initializeBoard();
//Start playing game
do {
getMove(currentPlayer); // update currentRow and currentCol
updateGame(currentPlayer, currentRow, currentCol); // update currentState
displayBoard();
// Print message if game-over
if (currentState == EX_WON) {
System.out.println("'X' player won!");
} else if (currentState == CIRCLE_WON) {
System.out.println("'O' player won!");
} else if (currentState == DRAW) {
System.out.println("It's a Draw!!");
}
// Switch player
currentPlayer = (currentPlayer == EX) ? CIRCLE : EX;
} while (currentState == PLAYING); // repeat if not game-over
}
//initializeBoard method
public static void initializeBoard() {
for (int row = 0; row < SIZE; ++row) {
for (int col = 0; col < SIZE; ++col) {
board[row][col] = BLANK; // all cells empty
}
}
currentState = PLAYING; // ready to play
System.out.println("Who wants to go first (X or O)? ");
Scanner xOrO = new Scanner(System.in);
String entOp = xOrO.nextLine();
char enterOp = entOp.charAt(0);
if (enterOp == 'X'){
currentPlayer = EX; // X plays first
} else {
currentPlayer = CIRCLE;
}
}
//getMove method: to prompt the current player for target position.
public static void getMove(int theSeed) {
boolean validInput = false; // for input validation
do {
if (theSeed == EX){
System.out.println("Enter a row (0,1,2) for player X: ");
Scanner enterRow = new Scanner(System.in);
System.out.println("Enter a column (0,1,2) for player X: ");
Scanner enterCol = new Scanner(System.in);
} else {
System.out.println("Enter a row (0,1,2) for player O: ");
Scanner enterRow = new Scanner(System.in);
System.out.println("Enter a column (0,1,2) for player O: ");
Scanner enterCol = new Scanner(System.in);
}
int row = in.nextInt();
int col = in.nextInt();
if (row >= 0 && row < SIZE && col >= 0 && col < SIZE && board[row][col] == BLANK) {
currentRow = row;
currentCol = col;
board[currentRow][currentCol] = theSeed; // update game-board content
validInput = true; // input okay, exit loop
} else {
System.out.println("This move at (" + (row) + "," + (col) // column adjustment
+ ") is not valid. Try again...");
}
} while (!validInput); // repeat until input is valid
}
/** Update the "currentState" after the player with "theSeed" has placed on
(currentRow, currentCol). */
public static void updateGame(int theSeed, int currentRow, int currentCol) {
if (findWinner(theSeed, currentRow, currentCol)) { // check if winning move
currentState = (theSeed == EX) ? EX_WON : CIRCLE_WON;
} else if (isDraw()) { // check for draw
currentState = DRAW;
}
// Otherwise, no change to currentState (still PLAYING).
}
/** Return true if it is a draw (no more empty cell) */
// TODO: Shall declare draw if no player can "possibly" win
public static boolean isDraw() {
for (int row = 0; row < SIZE; ++row) {
for (int col = 0; col < SIZE; ++col) {
if (board[row][col] == BLANK) {
return false; // an empty cell found, not draw, exit
}
}
}
return true; // no empty cell, it's a draw
}
/** Return true if the player with "theSeed" has won after placing at
(currentRow, currentCol) */
public static boolean findWinner(int theSeed, int currentRow, int currentCol) {
return (board[currentRow][0] == theSeed // 3-in-the-row
&& board[currentRow][1] == theSeed
&& board[currentRow][2] == theSeed
|| board[0][currentCol] == theSeed // 3-in-the-column
&& board[1][currentCol] == theSeed
&& board[2][currentCol] == theSeed
|| currentRow == currentCol // 3-in-the-diagonal
&& board[0][0] == theSeed
&& board[1][1] == theSeed
&& board[2][2] == theSeed
|| currentRow + currentCol == 2 // 3-in-the-opposite-diagonal
&& board[0][2] == theSeed
&& board[1][1] == theSeed
&& board[2][0] == theSeed);
}
//displayBoard method/
public static void displayBoard() {
System.out.println("-------------");
for (int row = 0; row < SIZE; ++row) {
System.out.print("|");
for (int col = 0; col < SIZE; ++col) {
printCell(board[row][col]);
if (col != SIZE) {
System.out.print("|");
}
}
System.out.println();
if (row != SIZE) {
System.out.println("-------------");
}
}
System.out.println();
}
/** Print a cell with the specified "content" */
public static void printCell(int content) {
switch (content) {
case BLANK: System.out.print(" "); break;
case CIRCLE: System.out.print(" O "); break;
case EX: System.out.print(" X "); break;
}
}
}