在IF条件声明VAR错误中的C＃cosole app错误 [英] C# cosole app ERROR in IF CONDITION DECLARING VAR ERROR

问题描述

 命名空间 ConsoleApplication3 
 {
  class 计划
 {
  public   static   void  Main（ string  [] args）
 {
  int  chess =  8 ; 
  string  dark =   x; 
  string  light =   y; 
  for （ var  line1 =  0 ; line1 <  chess; line1 ++）; 
 {
  for （ var  coloumn2 =  0 ; coloumn2 <  chess; coloumn2 ++）; 
 {
  string 结果; 
  if （LINE ==  0 ）
 {
 
} 
} 
} 
}}} 
 
 我尝试了什么： 
 
我只是想知道这个LINE1 VAR如果条件怎么做我是新来的C＃SORRY for SILLY QUESTION 

解决方案

不要使用var - 使用实际的变量类型。在这种情况下，这不是导致问题的原因，而是你的帽子钥匙坏了，你有假的分号！



试试这个：

  public   static   void  Main（ string  [] args）
 {
  int 国际象棋=  8 ; 
  string  dark =   x; 
  string  light =   y; 
  for （ var  line1 =  0 ; line1 <  chess; line1 ++）
 {
  for （< span class =code-keyword> var  column2 =  0 ; column2 < 国际象棋; column2 ++）
 {
  string 结果; 
  if （line1 ==  0 ）
 {
 .. 。
} 
} 
} 
} 

分号是C＃中的语句终结符，所以当你把它放在for循环的结束：

  for （ var  line1 =  0 ; line1 <  chess; line1 ++）; 
 {
  for （ var  coloumn2 =  0 ; coloumn2 <  chess; coloumn2 ++）; 
 

它结束了你在其中声明的变量的范围。

非常感谢@orginal griff我没注意到@wearwolf谢谢

              namespace ConsoleApplication3
{
    class Program
    {
        public static void Main(string[] args)
        {
            int chess = 8;
            string dark = "x";
            string light = "y";
            for (var line1 = 0; line1 < chess; line1++) ;
            {
             for (var coloumn2 = 0; coloumn2 < chess; coloumn2++) ;
                {
                    string result;
                    if (LINE== 0)
                    {

                  }
                }
            }
        } } }

What I have tried:

I JUST WANT TO DECLARE THIS LINE1 VAR IN IF CONDITION HOW TO DO IT I AM NEW IN C# SORRY FOR THE SILLY QUESTION

解决方案

Don't use var - use the actual variable type. It's not what's causing the problem in this case, it's that your caps KEY IS STUCK DOWN and you have spurious semicolons!

Try this:

public static void Main(string[] args)
    {
    int chess = 8;
    string dark = "x";
    string light = "y";
    for (var line1 = 0; line1 < chess; line1++)
        {
        for (var column2 = 0; column2 < chess; column2++)
            {
            string result;
            if (line1 == 0)
                {
                ...
                }
            }
        }
    }

Semicolon is a statement terminator in C#, so when you put one at the end of your for loops:

for (var line1 = 0; line1 < chess; line1++) ;
{
 for (var coloumn2 = 0; coloumn2 < chess; coloumn2++) ;

It ends the scope of the variable you declare within it.

thanks a lot @orginal griff I didn't noticed that @wearwolf thanks

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