C＃按鈕點擊和私有變量

所以我試圖做一個窗口形式猜數字遊戲，很簡單，但是當我點擊猜測時，無論標籤上升一個。我認爲，儘管有它們成爲全球userGuess這可能是由於我的變量仍然出來作爲一個局部變量...` 註釋掉userScore消除這個問題，但我還是不明白爲什麼邏輯失敗C＃按鈕點擊和私有變量

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 
using System.Drawing; 

namespace Guess_The_Number_Form 
{ 
    public partial class Form1 : Form 
    { 
     private int userScore; 
     private int randNum; 
     private int userGuess; 

     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 
      txtBoxGuess.Hide() 
      ; 
     } 

     private void toolTip1_Popup(object sender, PopupEventArgs e) 
     { 

     } 

     private void btnRandom_Click(object sender, EventArgs e) 
     { 
      Random rand = new Random(); 
      int randNum = rand.Next(0, 10); 
     } 

     private void textBox1_TextChanged(object sender, EventArgs e) 
     { 
      userGuess = Convert.ToInt32(txtBoxGuess.Text); 
     } 

     private void txtBoxGuess_Enter(object sender, EventArgs e) 
     { 

     } 

     private void btnGuess_Click(object sender, EventArgs e) 
     { 
      if (userGuess == randNum) 
      { 
//    userScore++; 
       lbluserScore.Text = userScore.ToString(); 
       lbluserScore.Text = $"{userScore}"; 
      } 
      else if (userGuess != randNum) 
      { 
       userScore--;    
       lbluserScore.Text = userScore.ToString(); 
       lbluserScore.Text = $"{userScore}"; 
      } 
      else if (userScore < 0) 
      { 
       lbluserScore.Text = Color.Red.ToString(); 
      } 
     } 
    } 
}

來源

2017-07-19 Liam Vallance

你需要改變這一點：

private void btnRandom_Click(object sender, EventArgs e) 
    { 
     Random rand = new Random(); 
     int randNum = rand.Next(0, 10); 
    }

到

private void btnRandom_Click(object sender, EventArgs e) 
    { 
     Random rand = new Random(); 
     randNum = rand.Next(0, 10); 
    }

這樣一來，你就設置成員變量randNum而不是局部變量randNum。您還想檢查是否確實將用戶輸入的值分配到userGuess。我的猜測是，這不是，這意味着你永遠不會改變任何一個變量的值，程序認爲用戶總是猜測正確的值。

來源

2017-07-19 18:52:06 Kdawg

啊我真是個白癡，謝謝！所以用於控制檯應用程序我忘記了它的方式。試圖修復userGuess錯誤，因爲我們說編輯：修正，歡呼隊友！ –

C＃按鈕點擊和私有變量

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