为什么循环不会在我的Windows窗体应用程序中工作？ [英] Why the loops wont work in my Windows Form Application?

问题描述

我尝试在Windows窗体应用程序中结合素数，偶数和奇数以及它们的结果。我已经在控制台中测试了代码，但在Windows Form中，它不会循环到下一个适用的编号。例如：在控制台1 - 10素数将导致2,3,5,7，但在Windows窗体应用程序将导致2

<$ p
public NumberCalc（）
{
InitializeComponent（）; $ p $ public partial class NumberCalc：Form



private void Primes_CheckedChanged（object sender，EventArgs e）
{
{
int f = Convert.ToInt32（Min.Text）;
int i = Convert.ToInt32（Max.Text）;
bool isPrime = true; （f = 0; f <= i; f ++）

对于（int j = 2; j< = i; j ++）
{

if（f！= j& f％j == 0）
{
isPrime = false;
break;


$ b $ if（isPrime）
{
string final;
final =（素数是：+ f）;
Result.Text = final;
}
isPrime = true;



$ private void Result_TextChanged（object sender，EventArgs e）
{

}

private void Min_TextChanged（object sender，EventArgs e）
{


$ b $ private void Evens_CheckedChanged（object sender，EventArgs e）
{
int f = Convert.ToInt32（Min.Text）;
int i = Convert.ToInt32（Max.Text）; （f = 0; f> = i; f ++）

if（f％2 == 0）
{
{
string final;
final =（偶数：+ f）;
Result.Text = final;





private void Odds_CheckedChanged（object sender，EventArgs e）
{

int f = Convert.ToInt32（Min.Text）;
int i = Convert.ToInt32（Max.Text）; （f = 0; f <= i; f ++）
{
if（f％2！= 0）
{
{
string final;
final =（偶数：+ f）;
Result.Text = final;




$ b code $

$ b $我觉得LINQ在这里比较合适，你可以试试这个：

解决方案

  int [] numbers = Enumerable.Range（f，if）.ToArray< int>（）; 
字符串oddNumbers = string.Join（，，从数字中的数字
其中（数字％2）！= 0 
选择数字）; 
 
字符串evenNumbers = string.Join（，，从数字中的数字
其中（数字％2）== 0 
选择数字）; 
 Result.Text =偶数是：+ evenNumbers; 
 Result.Text =奇数是：+ oddNumbers; 
  

更新为素数：

<$ p $ （$，$，$，$，$，$，$，$，$，$，$，$，$）

其中 IsPrime（）方法被定义为如下所示：

  private static bool IsPrime（int number）
 {
 for（int i = 2; i< number; i ++）
 if（number％i == 0）return false; 
返回true; 
} 
  

I am trying to combine prime numbers, even numbers and odd numbers and their results in a Windows Form Application. I have tested the code in Console but in Windows Form it will not loop to the next applicable number. For example: In console 1 - 10 in primes would result in "2, 3, 5, 7", however in Windows Form Application it will result in "2"

public partial class NumberCalc : Form
{
    public NumberCalc()
    {
        InitializeComponent();
    }

    private void Primes_CheckedChanged(object sender, EventArgs e)
    {
        {
            int f = Convert.ToInt32(Min.Text);
            int i = Convert.ToInt32(Max.Text);
            bool isPrime = true;

            for (f = 0; f <= i; f++)
            {
                for (int j = 2; j <= i; j++)
                {

                    if (f != j && f % j == 0)
                    {
                        isPrime = false;
                        break;
                    }

                }
                if (isPrime)
                {
                    string final;
                    final = ("The Prime Numbers Are:" + f);
                    Result.Text = final;
                }
                isPrime = true;
            }
        }
    }

    private void Result_TextChanged(object sender, EventArgs e)
    {

    }

    private void Min_TextChanged(object sender, EventArgs e)
    {

    }

    private void Evens_CheckedChanged(object sender, EventArgs e)
    {
        int f = Convert.ToInt32(Min.Text);
        int i = Convert.ToInt32(Max.Text);

        for (f = 0; f >= i; f++)
        {
            if (f % 2 == 0)
            {
                {
                    string final;
                    final = ("The Even Numbers Are:" + f);
                    Result.Text = final;
                }
            }
        }

    }

    private void Odds_CheckedChanged(object sender, EventArgs e)
    {

        int f = Convert.ToInt32(Min.Text);
        int i = Convert.ToInt32(Max.Text);

        for (f = 0; f <= i; f++)
        {
            if (f % 2 != 0)
            {
                {
                    string final;
                    final = ("The Even Numbers Are:" + f);
                    Result.Text = final;
                }
            }
        }
    }
}

}

解决方案

I think LINQ is more suitable here, You can try this:

int[] numbers = Enumerable.Range(f, i-f).ToArray<int>();
string oddNumbers=string.Join(",", from number in numbers 
                                   where (number % 2)!=0
                                   select number);

string evenNumbers = string.Join(",", from number in numbers
                                      where (number % 2) == 0
                                      select number);
Result.Text = "The Even Numbers Are:" + evenNumbers;
Result.Text = "The Odd Numbers Are:" + oddNumbers;

Updates for Prime number:

var primeNumbers= string.Join(",",from number in numbers
                                 where (IsPrime(number))
                                 select number);

Where IsPrime() method is defined as follows?

private static bool IsPrime(int number)
 {
   for (int i = 2; i < number; i ++)
     if (number % i == 0) return false;
   return true;
 }

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