writeline问题不断重复 [英] writeline issue keeps repeating

问题描述

在我的代码中，我似乎无法找到错误。正如您在我的代码中看到的那样，需要输入值1或0（否则会出现一条消息并要求重新输入值）但是此消息会不断重复。

 Console.WriteLine（ 请输入第一个值：< /跨度>）; 
 iValue1 = 
 Convert.ToInt16（Console.ReadLine（））; 
  while （iValue1 >   1 ）
 {
 Console.WriteLine（ 抱歉，值必须为1或0。重新输入值：）; 
} 

i似乎无法找到解决方法，发生这种情况对于我正在使用的所有三个值。



预览问题：

http://i.imgur.com/WAcT2Ho.png?1 [ ^ ]

解决方案

我想这一行

 iValue1 = 
 Convert.ToInt16（Console.ReadLine（））; 

必须再次进入while循环才能获得用户的新输入。

 Console.WriteLine（ 请输入第一个值：）; 
 iValue1 = 
 Convert.ToInt16（Console.ReadLine（））; 
  while （iValue1 >   1 ）
 {
 Console.WriteLine（ 抱歉，值必须为1或0。重新输入值：）; 
 iValue1 = Convert.ToInt16（Console.ReadLine（））; 
 
} 

您好，我无法重现您的问题。在控制台我输入1并单击输入按钮，我没有看到错误消息。您的代码似乎有些问题，您能否提供主要方法的完整代码

  public   static   void  Main（ string  [] args）
 {
  int  iValue1; 
 Console.WriteLine（ 请输入第一个值：）; 
 iValue1 = 
 Convert.ToInt16（Console.ReadLine（））; 
  while （iValue1 >   1 ）
 {
 Console.WriteLine（ 抱歉，值必须为1或0。重新输入值：）; 
} 
 Console.ReadLine（）; 

我之前认为你输入时会出现这个错误1或0，你没有明确提到这个错误。



你的错误原因是'while循环'说你输入5然后循环将继续作为条件运行时（iValue1> 1）总是正确

而不是while循环使用如果条件



如您在这里提供的代码是解决方案：使用do而不是while循环，如下所示

  do  
 
 {
  if （iValue1 >  < span class =code-digit> 1 ）
 {
 Console.WriteLine（ 抱歉值必须为1或0.请重新输入值：）; 
 iValue1 = Convert.ToInt16（Console.ReadLine（））; 
} 
} 
  while （iValue1 >   1 ）; 

within my code there is error i cant seem to find. as you can see by my code a value of 1 or 0 needs to be entered (otherwise a message occurs and asks for the value to be re-entered) however this message keeps repeating constantly.

Console.WriteLine("Please enter first value: ");
iValue1 =
    Convert.ToInt16(Console.ReadLine());
while (iValue1 > 1)
{
    Console.WriteLine("Sorry value must be 1 or 0. Please re-enter value: ");
}

i can't seem to find out how to fix this, this happens for all three values i am using.

Preview of Problem:
http://i.imgur.com/WAcT2Ho.png?1[^]

解决方案

I guess this line

iValue1 =
    Convert.ToInt16(Console.ReadLine());

must come again inside the while loop to get the fresh input from the user.

Console.WriteLine("Please enter first value: ");
iValue1 =
    Convert.ToInt16(Console.ReadLine());
while (iValue1 > 1)
{
    Console.WriteLine("Sorry value must be 1 or 0. Please re-enter value: ");
    iValue1 = Convert.ToInt16(Console.ReadLine());

}

Hi, I am not able to reproduce your issue. at console i enter 1 and click enter button, i do not see error message. It seems some thing is wrong with your code, Can you provide the complete code of main method

public static void Main(string[] args)
       {
           int iValue1;
           Console.WriteLine("Please enter first value: ");
           iValue1 =
               Convert.ToInt16(Console.ReadLine());
           while (iValue1 > 1)
           {
               Console.WriteLine("Sorry value must be 1 or 0. Please re-enter value: ");
           }
           Console.ReadLine();

I thought earlier that you are getting this error when you enter 1 or 0, you have not mentioned explicitly when this error is coming.

Reason of your error is 'while loop' Say you entered 5 then while loop will keep on running as condition while (iValue1 > 1) always true
instead of while loop use If condition

As you have provided your code here is the solution: use do while instead of while loop as shown below

do

{
    if (iValue1 > 1)
    {
        Console.WriteLine("Sorry value must be 1 or 0. Please re-enter value: ");
        iValue1 = Convert.ToInt16(Console.ReadLine());
    }
}
while (iValue1 > 1);

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