Question

我的计划有问题。

import java.util.*;
public class P1D{
public static void main (String args[]) {

boolean error = false;
String randString;

int i = 0;
System.out.println("Number|Power|Between");

for(i = 1; i <= 10; i++)
    {

    int number = i; //numbers 1-10
    int numbersq = (int)(Math.pow(i, 2)); //square of numbers

    Random rand = new Random();

    int random = (rand.nextInt(numbersq) + (number - 1)); //random number between number & square (inclusive)

    if (number == 1) //prevents random from being over 1
        {
            random = 1;
        }

    if (random > numbersq || random < number) //if random is out of bounds, displays an error
    {
        //error = true;
        randString = (String.valueOf(random) + "   <-- ERROR");

    } //notifies me of errors if random is out of bounds

    else //if no error, random isn't changed and error=false
    {
        error = false;
        randString = String.valueOf(random);
    }
    System.out.println(number + "\t" + numbersq + "\t" + randString);
    }

    if ( error = false )
        {
            System.out.println("all good in the hood");
        }

    else
        {
            System.out.println("Something went wrong");
        }

}
}

该计划旨在：

清单编号1-10。
将数字平方。
在原始数字和方形（包括）之间打印一个随机数

问题是随机数通常高于或低于限制（不是很多），并且检查错误的布尔值总是表示存在错误，即使没有错误。

有人可以提供有关如何补救随机限制和布尔问题的建议吗？

Answer 1

尝试此解决方案 - 它符合您的所有要求

import java.util.*;

public class P1D{

    public static void main (String args[]) {
        boolean error = false;
        String randString;
        System.out.println("Number|Power|Between");

       for(int i = 1; i <= 10; i++)
       {
            int numbersq = i*i; //square of numbers
            Random rand = new Random();

            //random number between number & square (inclusive)
            int random = (rand.nextInt((numbersq - i) + 1) + i);

            //prevents random from being over 1
            if (i == 1)
                random = 1;

            //if random is out of bounds, displays an error
            if (random > numbersq || random < i) {
                error = true;
                randString = (String.valueOf(random) + "   <-- ERROR");
            }
            //notifies me of errors if random is out of bounds

            //if no error, random isn't changed and error=false
            else {
                error = false;
                randString = String.valueOf(random);
            }
            System.out.println(i + "\t" + numbersq + "\t" + randString);
        }

        if (!error) {
            System.out.println("all good in the hood");
        } else {
            System.out.println("Something went wrong");
        }

    }
}

数|电源|
之间
1 1 1

2 4 3

3 9 9

4 16 10

5 25 11

6 36 29

7 49 24

8 64 35

9 81 75

10 100 52

引擎盖上的一切都很好

随机和布尔错误

1 个答案: