Question

我的问题是我不知道如何从同一个扫描仪行读取两个整数（用空格分隔）并验证它们都是整数，如果没有，则打印相应的错误消息并重新提示。当我输入两个非整数作为输入

时，这是一些如何打印错误消息的方法

/**
 * Gets the position from the user of where the next move should be         
 * made. The board is then updated with a valid move
 *
 * @return true if there is a winner and false if there is no winner
 * 
 */



public boolean getMove()
{


boolean invalid = true;
int row = 0;
int column = 0;

//keeps asking for a position until the user enters a valid one
while (invalid)
{

    row = -1;
    column = -1;

    System.out.println("Which row, column would you like to move to? Enter two numbers between 0-2 separated by a space to indicate position in (x,y).");

    if (keyboard.hasNextInt())
    {

        row = keyboard.nextInt();

        if (keyboard.hasNextInt())
        {

            column = keyboard.nextInt();

        }
    } else
    {

        keyboard.nextLine();
        System.out.println("\nBoth inputs must be integers between 0 and 2.\n");

    }
    //check that the position is within bounds
    if (row >= 0 && row <= 2 && column >= 0 && column <= 2)
    {

        //check that the position is not already occupied
        if (board[row][column] != ' ')
        {
            System.out.println("That position is already taken");
        } else
        {
            invalid = false;
        }
    } else
    {
        System.out.println("Invalid position");
    }
}

//if it's currently X's turn then mark the space as char 'X' else 'O'
if (xTurn)
{
    board[row][column] = 'X';

} else
{
    board[row][column] = 'O';

}

//fill in the game board with the valid position
return winner(row, column);

}

Answer 1

您可以将其作为字符串读取，按空格分割并获取每个条目的值。

TicTacToe游戏验证问题在同一扫描仪行上有两个整数

1 个答案: