java - 为什么这个方法和 for 循环执行的次数比我想要的要多？

Question

我正在处理一个 Java 问题集，该问题需要执行 N 次特定方法(在本例中，N = 5)。

但由于某种原因，每次我运行该程序时，它都会执行(或至少打印)10 次。我不知道如何让它只打印 5 次。

我对编程非常陌生，所以如果这是一个简单的修复，我深表歉意。感谢您的帮助!

public static void main (String [] args)
{
    final int N = 5;
    int sum = 0;

    for (int i = 1; i <= N; i++)
    {
        drunkWalk();
        int stepCount = drunkWalk();
        sum += stepCount;

        if (i == N)
        {
            System.out.println ("Average # of steps equals " + (sum/N));
        }
    }
}       


public static int drunkWalk ()
{

    int start = 5;                      //initializes variables
    int steps = 0;
    int position = 0;
    System.out.println ("Here we go again...time for a walk!");

    do 
    {
       int direction = retInt ();

       if (direction%2 == 0)                //Determines if it will go left, towards home/0
       {
        position = start - 1;
       }

       else                         //Determines if it will go right, towards jail/10
       {
        position = start + 1;
       }

       start = position; 

       steps++;
    } while (position != 0 && position != 10);

    System.out.println ("Took " + steps + " steps, and");

    if (position == 0)
    {
       System.out.println ("Landed at HOME");
    }

    else 
    {
       System.out.println ("Landed in JAIL");
    }

    System.out.println ();

    return steps;                                //So the sum of the # of steps can continue to be calculated for the sum in main's for loop
}

public static int retInt ()                     //Returns odd or even integer to determine the direction in drunkWalk()
{
    return (int)(6 * Math.random ());
}

}

Answer 1

drunkWalk();
int stepCount = drunkWalk();

你实际上调用了两次。删除第一个，只走一次。请注意，它也不分配其返回值，因此它不会对返回的结果执行任何操作。