而/ Do While循环在Java中

Question

这是我的问题:

一名学生决定通过稍微粉碎来提前庆祝感恩节的开始.

她的家位于主街0号角,监狱位于主街10号角.学生从第5角开始,向左或向右徘徊一个角,概率为0.5; 她重复这个过程,直到安全抵达家中或登陆监狱.也就是说,在每个角落,醉酒的学生向左或向右错开50-50的概率,到下一个更高编号或下一个更低编号的角落.

使用while或do-while循环编写名为drunkWalk()的方法,模拟醉酒学生的步行; 你的方法应该返回一个整数,这个整数都表示采取了多少步骤以及学生是在监狱里还是在家里.如果你将这个人作为负数返回,如果这个人进入监狱,你可以这样做,如果这个人最终在家,则可以作为正数.您不应该打印出最终版本的方法中的每个步骤,尽管您可能希望在调试时执行此操作.

一旦你的方法工作,让你的主程序调用你的drunkWalk()方法N次(其中N是一个最终的变量).最后,计算并打印学生一次旅行所需的平均步数.这是你的程序在行动中的样子,N等于5:

Here we go again... time for a walk! <br/>
Took 37 steps, and <br/>
Landed at HOME<br/>

Here we go again... time for a walk!<br/>    
Took 19 steps, and <br/>
Landed in JAIL<br/>

Here we go again... time for a walk!<br/>
Took 13 steps, and <br/>
Landed in JAIL<br/>

Here we go again... time for a walk! <br/>
Took 25 steps, and <br/>
Landed in JAIL<br/>

Here we go again... time for a walk!<br/>
Took 15 steps, and <br/>
Landed at HOME<br/>

Average # of steps equals 25.4<br/>

这是我的代码:它编译但我没有输出.我认为我的代码过于复杂,但我不知道如何简化它:

class Drunk     
{

// When this code runs, nothing prints out????

  public static void main(String[] args)
  {
    int home = 0; 
    int jail = 10;  

    final int N = 5; 
    int sum = 0;

    int a = drunkWalk(N); 
    sum = sum + a; 

    //System.out.println ("Average # of steps equals" + " " + (a/sum));

  }

  static int drunkWalk(int x)
  {
    int steps; // steps is the number of steps taken by the student
    int total=5;  // total is the starting point of the student (at corner 5)

    while (x > 0); 
    {   
      do 
      { 
        steps = (int) (Math.random() * (10 +  10) - 10); 
        total += steps;
        x = x-1;
      } while (total != 0 || total != 10);
    }

    if (total == 0) 
    {
      System.out.println("Here we go again... time for a walk!");
      System.out.println("Took" + " " + steps + "steps, and");
      System.out.println ("Landed at HOME"); 
    }

    if (total == 10) 
    { 
      System.out.println("Here we go again... time for a walk!");
      System.out.println("Took" + " " + steps + "steps, and");
      System.out.println ("Landed in JAIL"); 
    }

    return steps; // Need to figure out how to add up ALL the steps
  }

请帮忙!

Answer 1

;在while终止你的循环之后.因此,;在while语句后删除分号:

while (x > 0);// remove semicolon  ;

作为你的第一个while循环结束,值total,steps没有得到改变.