创建一个随机循环，直到语句为真答案

【问题标题】：create a random loop until a statement is true创建一个随机循环，直到语句为真
【发布时间】：2013-01-23 14:00:58
【问题描述】：

如果我想让程序生成一个随机数然后re-read/loopelse if statement直到找到类似这样的语句if(button1.Text == "")，随机数只需要到9 .

这是我的代码，

    private void button1_Click(object sender, EventArgs e)
    {
          var rc = new Random();
          storeRI = rc.Next(1, 9);

            if (storeRI == 1)
            {
                if (button1.Text == "")
                {
                    button1.Text = "X";
                }
                else
                {
                   //Need to generate another random number
                    //And read the else if statement again... how?
                }

            }

            else if (storeRI == 2)
            {
                if (button1.Text == "")
                {
                    button1.Text = "X";
                }
                else
                {
                   //Need to generate another random number
                    //And read the else if statement again... how?
                }

            }

【问题讨论】：

检查这个：stackoverflow.com/questions/10688044/…
我不太明白这段代码的用途。
我首先想到的是while loop。然后，我向下浏览，看看其他人回答了什么，然后宾果游戏！我们有同样的想法。 while(I_havent_find_the_answer) do

标签： c# winforms visual-studio-2012 random-sample

【解决方案1】：

private void button1_Click(object sender, EventArgs e)
{
      var rc = new Random();
      do
      {
        storeRI = rc.Next(1, 9);

        if (storeRI == 1)
        {
            if (button1.Text == "")
            {
                button1.Text = "X";
            }
        }

        else if (storeRI == 2)
        {
            if (button1.Text == "")
            {
                button1.Text = "X";
            }
        }
      } while (button1.Text == "");
 }

【讨论】：

谢谢！正是我需要的！

【解决方案2】：

将if 语句放入while() 循环中。然后有一个条件来执行break; 语句来终止循环：

while(button1.Text == "")
{
    if (storeRI == 1)
    {
        if (button1.Text == "")
        {
            button1.Text = "X";
        }
        else
        {
             //Need to generate another random number
             storeRI = rc.Next(1, 9);
        }

    }

    else if (storeRI == 2)
    {
     ...
    }
    else
        break;
}

【讨论】：

【解决方案3】：

var rc = new Random();
int[] numbers = { 1, 2 }; // numbers from your if..else blocks

do {
  storeRI = rc.Next(1, 9);

  if (!numbers.Contains(storeRI))
      break; // not matched any if..else block

  if (button1.Text == "")
  {
      button1.Text = "X";
      break; // set text and break loop
  }

} while(true); // generate new number and do check again

【讨论】：