简单的猜数字（JAVA版）

按书上的样例来操作的。

不过，书上提到的BUG，我没有在看下一章时就解决了哈。。

从网上查找的删除数组元素的方法。

其实，将数据结构更改为ARRAYLIST，可能更简单。：）

GameHelper.java

import java.io.*;

public class GameHelper {
    public String GetUserInput(String prompt) {
        String inputLine = null;
        System.out.println(prompt + " ");
        try {
            BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
            inputLine = is.readLine();
            if (inputLine.length() == 0 )
                return null;
        } catch (IOException e) {
            System.out.println("IOException: " + e);
        }
        return inputLine;
    }

}

SimpleDotCom.java

public class SimpleDotCom {
    int[] locationCells;
    int numOfHits = 0;

    public void setLocationCells(int[] locs) {
        locationCells = locs;
    }

    public int[] delLocationCells(int eleInt) {
        for(int i = 0; i < locationCells.length; i++) {
            if (eleInt == locationCells[i]) {
                for(int j = i + 1; j < locationCells.length; j ++) {
                    locationCells[i] = locationCells[j];
                }
            }
        }
        return locationCells;
    }

    public String checkYourself(String stringGuess) {
        int guess = Integer.parseInt(stringGuess);
        String result  = "miss";
        for (int cell : locationCells) {
            if (guess == cell) {
                result = "hit";
                numOfHits++;
                delLocationCells(guess);
                break;
            }
        }

        if (numOfHits == locationCells.length) {
            result = "kill";
        }
        System.out.println(result);
        return result;
    }

}

SimpleDotComTestDrive.java

public class SimpleDotComTestDrive {
    public static void main(String[] args) {
        int numOfGuesses = 0;
        GameHelper helper = new GameHelper();

        SimpleDotCom theDotCom = new SimpleDotCom();
        int randomNum = (int) (Math.random() * 5);

        int[] locations = {randomNum, randomNum + 1, randomNum + 2};
        theDotCom.setLocationCells(locations);
        boolean isAlive = true;

        while(isAlive == true) {
            String guess = helper.GetUserInput("Enter a number");
            String result = theDotCom.checkYourself(guess);
            numOfGuesses++;
            if(result.equals("kill")) {
                isAlive = false;
                System.out.println("You took " + numOfGuesses + " guesses.");
            }

        }

    }
}

输出：