为什么我的switchPlayer（）方法只能工作一次？该方法应该可以独立工作，当我把它放在我的playGame（）方法之后，在placeMark（）之后，它会连续工作，但这会弄乱我的currentPlayer变量，这会弄乱其他方法。我不想制作一个玩家对象，所以我假设我只是缺少一些简单的东西，比如放置switchPlayer（）方法的位置。
我的结果是这样的：
子类的相关代码：
public void playGame(){
assignNames();
assignMarks();
explainGame();
while(checkWin() == false && fullBoard() == false){
getNum();
placeMark();
printBoard();
}
gameResult();
}
public void placeMark(){
if(validNumber() == true){
if(num == 1){
board[0][0] = currentMark;
switchPlayer();
}
if(num == 2){
board[0][1] = currentMark;
switchPlayer();
}
if(num == 3){
board[0][2] = currentMark;
switchPlayer();
}
if(num == 4){
board[1][0] = currentMark;
switchPlayer();
}
if(num == 5){
board[1][1] = currentMark;
switchPlayer();
}
if(num == 6){
board[1][2] = currentMark;
switchPlayer();
}
if(num == 7){
board[2][0] = currentMark;
switchPlayer();
}
if(num == 8){
board[2][1] = currentMark;
switchPlayer();
}
if(num == 9){
board[2][2] = currentMark;
switchPlayer();
}
}
}
public void switchPlayer(){
if(currentMark == 'X')
currentMark = 'O';
else{
currentMark = 'X';
}
if(currentMark == 'O' && playerMark1 == 'O'){
currentPlayer = playerName1;
}
else{
currentPlayer = playerName2;
}
}
主类的相关代码：
TicTacToe game = new TicTacToe();
game.playGame();
好像我应该发布整个代码......所以这就是。
public class TicTacToe {
private static char[][] board;
Scanner input = new Scanner(System.in);
int num;
String entry;
String playerName1;
char playerMark1;
String playerName2;
char playerMark2;
char currentMark;
String currentPlayer;
public void playGame(){
assignNames();
assignMarks();
explainGame();
while(checkWin() == false && fullBoard() == false){
getNum();
placeMark();
printBoard();
}
gameResult();
}
public TicTacToe(){
board = new char[3][3];
clearBoard();
} // end TicTacToe()
public void clearBoard(){
for(int a = 0; a < 3; a++){
for(int b = 0; b < 3; b++){
board[a][b] = ' ';
}
}
}// end clearBoard()
public void printBoard(){
System.out.println("-------------");
for (int a = 0; a < 3; a++) {
System.out.print("| ");
for (int b = 0; b < 3; b++) {
System.out.print(board[a][b] + " | ");
}
System.out.println();
System.out.println("-------------");
}
}
public boolean fullBoard() {
boolean full = true;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if (board[i][j] == ' ') {
full = false;
}
}
}
return full;
}
public void explainGame(){
System.out.println("-------------");
System.out.println("| 1 | 2 | 3 |");
System.out.println("-------------");
System.out.println("| 4 | 5 | 6 |");
System.out.println("-------------");
System.out.println("| 7 | 8 | 9 |");
System.out.println("-------------");
System.out.println("The above board shows which numbers you must enter to place your mark in their respective locations.\n");
System.out.println("Randomly assigning player marks. . .");
System.out.println(playerName1+" will be Player "+playerMark1+", and "+playerName2+" will be Player "+playerMark2 + ".");
System.out.println("Player X will go first. Press any key to begin playing.");
entry = input.nextLine();
}
public void assignNames(){
System.out.println("Enter a name for Player 1.");
entry = input.nextLine();
playerName1 = entry;
System.out.println("Enter a name for Player 2.");
entry = input.nextLine();
playerName2 = entry;
}
public void assignMarks(){
Random rand = new Random();
int i = rand.nextInt(2);
if( i == 0 ){
playerMark1 = 'X';
playerMark2 = 'O';
}
else{
playerMark1 = 'O';
playerMark2 = 'X';
}
currentMark = 'X';
if(playerMark1 == 'X')
currentPlayer = playerName1;
else
currentPlayer = playerName2;
}
public void switchPlayer(){
if(currentMark == 'X')
currentMark = 'O';
else{
currentMark = 'X';
}
if(currentMark == 'O' && playerMark1 == 'O'){
currentPlayer = playerName1;
}
else{
currentPlayer = playerName2;
}
}
public int getNum(){
System.out.println(currentPlayer + ", place your mark (1-9).");
num = input.nextInt();
return num;
}
public boolean validSpot(int num){
boolean goodSpot = false;
if(num == 1 && board[0][0] == ' ')
goodSpot = true;
if(num == 2 && board[0][1] == ' ')
goodSpot = true;
if(num == 3 && board[0][2] == ' ')
goodSpot = true;
if(num == 4 && board[1][0] == ' ')
goodSpot = true;
if(num == 5 && board[1][1] == ' ')
goodSpot = true;
if(num == 6 && board[1][2] == ' ')
goodSpot = true;
if(num == 7 && board[2][0] == ' ')
goodSpot = true;
if(num == 8 && board[2][1] == ' ')
goodSpot = true;
if(num == 9 && board[2][2] == ' ')
goodSpot = true;
if(goodSpot == false){
System.out.println("Input error. Make sure the spot is not taken.");
}
return goodSpot;
}
public boolean validRange(int num){
boolean goodRange = false;
if(num >= 1 && num <= 9 ){
goodRange = true;
}
if(goodRange == false){
System.out.println("Input error. Make sure the number is between 1-9.");
}
return goodRange;
}
public boolean validNumber(){
return ((validRange(num) && validSpot(num)));
}
public void placeMark(){
if(validNumber() == true){
if(num == 1){
board[0][0] = currentMark;
switchPlayer();
}
if(num == 2){
board[0][1] = currentMark;
switchPlayer();
}
if(num == 3){
board[0][2] = currentMark;
switchPlayer();
}
if(num == 4){
board[1][0] = currentMark;
switchPlayer();
}
if(num == 5){
board[1][1] = currentMark;
switchPlayer();
}
if(num == 6){
board[1][2] = currentMark;
switchPlayer();
}
if(num == 7){
board[2][0] = currentMark;
switchPlayer();
}
if(num == 8){
board[2][1] = currentMark;
switchPlayer();
}
if(num == 9){
board[2][2] = currentMark;
switchPlayer();
}
}
}
public boolean checkSpot(char c1, char c2, char c3) {
return ((c1 != ' ') && (c1 == c2) && (c2 == c3));
}
public boolean checkWin() {
return (checkWinRows() || checkWinColumns() || checkWinDiagonals());
}
public boolean checkWinRows() {
for (int i = 0; i < 3; i++) {
if (checkSpot(board[i][0], board[i][1], board[i][2]) == true) {
return true;
}
}
return false;
}
public boolean checkWinColumns() {
for (int i = 0; i < 3; i++) {
if (checkSpot(board[0][i], board[1][i], board[2][i]) == true) {
return true;
}
}
return false;
}
public boolean checkWinDiagonals() {
return ((checkSpot(board[0][0], board[1][1], board[2][2]) == true) || (checkSpot(board[0][2], board[1][1], board[2][0]) == true));
}
public void gameResult(){
switchPlayer();
if(checkWin()){
System.out.println("\nGAME OVER -- " +currentPlayer+ " WINS! WOO HOO!");
}
else if(fullBoard()){
System.out.println("\nGAME OVER -- DRAW!");
}
}
} // end TicTacToe
答案 0 :(得分：2)
更改
if(currentMark == 'O' && playerMark1 == 'O')
到
if(currentPlayer==playerName2)
您的代码并不总是有效，因为它只会在当前标记= 0且播放器1标记= 0时更改为播放器1.这只适用于玩家1在游戏开始时被指定为“O”的情况。
希望它有所帮助。
答案 1 :(得分：1)
如果当前和播放器1标记都是X，则切换播放器代码不执行任何操作。尝试：
if (currentMark == playerMark1){
currentPlayer = playerName1;
} else {
currentPlayer = playerName2;
}