猜数字游戏GuessNumber verison1.1

猜数字游戏GuessNumber version1.1

version1.0: http://www.cnblogs.com/Coder816/p/4153816.html

        在1.0的版本中，系统生成的正确答案中有时候会出现相同的数字，这样在5次机会下，有可能无法猜中正确答案，游戏会显得很不合理。因此在1.1的版本中，将相应的代码改成了如下所示：

        // 1.生成正确答案
        String correctAnswer = "";
        // 生成四个一位随机数，并将其转换成String类型
        for (int i = 0; i < 4; i++)
        {
            int a;
            // 如果数字a已经存在correctAnswer中，则重新生成一个数
            do
            {
                a = (int) (Math.random() * 10);
            }
            while (correctAnswer.contains(((CharSequence) ("" + a))));
            correctAnswer += a;
        }
        // System.out.println(correctAnswer);

        同时，也包装了输入流，如下所示：

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

            // 2.输入猜测的数字
            String num = "";
            try
            {
                num = br.readLine();
            }
            catch (IOException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        修改后的完整代码如下：

/* 
 * @author nlee
 * @version 2:58:11 PM Dec 9, 2014
 /
package guessNum;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class GuessNum
{
    public static void main(String[] args)
    {
        // 1.生成正确答案
        String correctAnswer = "";
        // 生成四个一位随机数，并将其转换成String类型
        for (int i = 0; i < 4; i++)
        {
            int a;
            // 如果数字a已经存在correctAnswer中，则重新生成一个数
            do
            {
                a = (int) (Math.random() * 10);
            }
            while (correctAnswer.contains(((CharSequence) ("" + a))));
            correctAnswer += a;
        }
        // System.out.println(correctAnswer);
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    // 输入上限为5次
    int times = 5;
    for (int j = 0; j < times; j++)
    {
        System.out.println("You have " + (times - j) + " times, "
                + "please entry your number(four figures):");
        // 2.输入猜测的数字
        String num = "";
        try
        {
            num = br.readLine();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        // num与correctAnswer的比较结果
        String implynum = "";
        // 3.比较num与correctAnswer
        for (int i = 0; i < 4; i++)
        {
            if (correctAnswer.charAt(i) == num.charAt(i))
            {
                implynum += "T";
            }
            else
                // 判断correctAnswer是否包含num.charAt(i)这个数字
                if (correctAnswer.contains(((CharSequence) ("" + num
                        .charAt(i)))))
                {
                    implynum += "C";
                }
                else
                {
                    implynum += "F";
                }
        }
        System.out.println(implynum);
        // 如果implynum等于“TTTT”，表明猜对了，结束循环
        if (implynum.equals("TTTT"))
        {
            System.out
                    .println("\nCorrect Answer!\nCongratulations!\nYou have succeed!");
            break;
        }
        else
            // 如果implynum不等于“TTTT”， 并且猜测次数也达到上限，表明游戏失败
            if (j == (times - 1))
            {
                System.out.println("\nYou have failed!\nGame over!");
                System.out.println("\nCorrect Answer is: " + correctAnswer);
            }
            else
            {
                System.out.println("Wrong Answer!\nPlease try again!\n");
            }
    	}
    }
}