Add "Remarks" and "Example" headings for error references in range [C2001, C2020]

Rageking8 · web-flow · commit 4d78744ba0a7 · 2025-07-09T23:39:45.000+08:00
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2001.md b/docs/error-messages/compiler-errors-1/compiler-error-c2001.md
@@ -10,6 +10,8 @@ ms.assetid: 0c3a7821-d8e5-4398-ab5a-4116d46e8dda
 
 > newline in constant
 
+## Remarks
+
 A string constant cannot be continued on a second line unless you do the following:
 
 - End the first line with a backslash.
@@ -18,7 +20,7 @@ A string constant cannot be continued on a second line unless you do the followi
 
 Ending the first line with \n is not sufficient.
 
-## Examples
+## Example
 
 The following sample generates C2001:
 
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2002.md b/docs/error-messages/compiler-errors-1/compiler-error-c2002.md
@@ -10,6 +10,8 @@ ms.assetid: 91982314-203a-4de1-b884-94e39a623f61
 
 > invalid wide-character constant
 
+## Remarks
+
 The multibyte-character constant is not valid.
 
 ### To fix by checking the following possible causes
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2003.md b/docs/error-messages/compiler-errors-1/compiler-error-c2003.md
@@ -10,4 +10,6 @@ ms.assetid: 3161bc08-593d-4448-9fd3-4e3810be9e82
 
 > expected 'defined id'
 
+## Remarks
+
 An identifier must follow the preprocessor keyword.
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2004.md b/docs/error-messages/compiler-errors-1/compiler-error-c2004.md
@@ -10,11 +10,13 @@ ms.assetid: d81526dd-3a00-4593-87b0-d910d3d29bca
 
 > expected 'defined(id)'
 
+## Remarks
+
 An identifier must appear in the parentheses following the preprocessor keyword.
 
 This error can also be generated as a result of compiler conformance work that was done for Visual Studio .NET 2003: missing parenthesis in preprocessor directive. If the closing parenthesis is missing from a preprocessor directive, the compiler will generate an error.
 
-## Examples
+## Example
 
 The following sample generates C2004:
 
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2005.md b/docs/error-messages/compiler-errors-1/compiler-error-c2005.md
@@ -10,8 +10,12 @@ ms.assetid: 090530ed-e0ec-4358-833a-ca24260e7ffe
 
 > #line expected a line number, found 'token'
 
+## Remarks
+
 The `#line` directive must be followed by a line number.
 
+## Example
+
 The following sample generates C2005:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2006.md b/docs/error-messages/compiler-errors-1/compiler-error-c2006.md
@@ -9,8 +9,12 @@ helpviewer_keywords: ["C2006"]
 
 > 'directive': expected "FILENAME" or \<FILENAME>
 
+## Remarks
+
 Directives such as [#include](../../preprocessor/hash-include-directive-c-cpp.md) or [#import](../../preprocessor/hash-import-directive-cpp.md) require a filename. To resolve the error, ensure the filename is valid and enclosed in either double quotes or angle brackets.
 
+## Example
+
 The following sample generates C2006:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2007.md b/docs/error-messages/compiler-errors-1/compiler-error-c2007.md
@@ -10,8 +10,12 @@ ms.assetid: ecd09d99-5036-408b-9e46-bc15488f049e
 
 > #define syntax
 
+## Remarks
+
 No identifier appears after a `#define`. To resolve the error, use an identifier.
 
+## Example
+
 The following sample generates C2007:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2008.md b/docs/error-messages/compiler-errors-1/compiler-error-c2008.md
@@ -10,8 +10,12 @@ ms.assetid: e748ccbe-ffd4-4008-aca7-e53c25225209
 
 > 'character' : unexpected in macro definition
 
+## Remarks
+
 The character appears immediately following the macro name. To resolve the error, there must be a space after the macro name.
 
+## Example
+
 The following sample generates C2008:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2009.md b/docs/error-messages/compiler-errors-1/compiler-error-c2009.md
@@ -10,9 +10,11 @@ ms.assetid: fe9d94ed-20a5-4d83-b9c4-60ee69d2f30a
 
 > reuse of macro formal 'identifier'
 
+## Remarks
+
 The formal parameter list of a macro definition uses the identifier more than once. Identifiers in the macro's parameter list must be unique.
 
-## Examples
+## Example
 
 The following sample generates C2009:
 
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2010.md b/docs/error-messages/compiler-errors-1/compiler-error-c2010.md
@@ -10,8 +10,12 @@ ms.assetid: 5795ed1d-e206-410b-b7b4-528d125c67b4
 
 > 'character' : unexpected in macro formal parameter list
 
+## Remarks
+
 The character is used incorrectly in the formal parameter list of a macro definition. Remove the character to resolve the error.
 
+## Example
+
 The following sample generates C2010:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2011.md b/docs/error-messages/compiler-errors-1/compiler-error-c2011.md
@@ -10,12 +10,16 @@ ms.assetid: 992c9d51-e850-4d53-b86b-02e73b38249c
 
 > 'identifier' : 'type' type redefinition
 
+## Remarks
+
 The identifier was already defined as `type`. Check for redefinitions of the identifier.
 
 You may also get C2011 if you import a header file or type library more than once into the same file. To prevent multiple inclusions of the types defined in a header file, use include guards or a `#pragma`[once](../../preprocessor/once.md) directive in the header file.
 
 If you need to find the initial declaration of the redefined type, you can use the [/P](../../build/reference/p-preprocess-to-a-file.md) compiler flag to generate the preprocessed output passed to the compiler. You can use text search tools to find instances of the redefined identifier in the output file.
 
+## Example
+
 The following sample generates C2011 and shows one way to fix it:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2012.md b/docs/error-messages/compiler-errors-1/compiler-error-c2012.md
@@ -10,8 +10,12 @@ ms.assetid: 9f0d8162-c0b3-4234-a41f-836fdb75c84e
 
 > missing name following '<'
 
+## Remarks
+
 An `#include` directive lacks the required filename.
 
+## Example
+
 The following sample generates C2012:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2013.md b/docs/error-messages/compiler-errors-1/compiler-error-c2013.md
@@ -10,8 +10,12 @@ ms.assetid: 6b5c955c-53da-48ee-8533-64ef5b905173
 
 > missing '>'
 
+## Remarks
+
 An `#include` directive lacks a closing angle bracket. Add the closing bracket to resolve the error.
 
+## Example
+
 The following sample generates C2013:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2014.md b/docs/error-messages/compiler-errors-1/compiler-error-c2014.md
@@ -10,8 +10,12 @@ ms.assetid: 231d8e9c-48c0-4027-99a3-245d186275ec
 
 > preprocessor command must start as first nonwhite space
 
+## Remarks
+
 The `#` sign of a preprocessor directive must be the first character on a line that is not white space.
 
+## Example
+
 The following sample generates C2014:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2015.md b/docs/error-messages/compiler-errors-1/compiler-error-c2015.md
@@ -10,6 +10,8 @@ ms.assetid: 8f40af0a-3a5a-4d6a-8ed7-125966e6bfed
 
 > too many characters in constant
 
+## Remarks
+
 A character constant contains more than two characters. The limit is one character for standard character constants and two characters for long character constants.
 
 An escape sequence, such as \t, is converted to a single character.
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2016.md b/docs/error-messages/compiler-errors-1/compiler-error-c2016.md
@@ -9,6 +9,8 @@ helpviewer_keywords: ["C2016"]
 
 > C requires that a struct or union has at least one member
 
+## Remarks
+
 The compiler found a **`struct`** or **`union`** defined with no members, which isn't allowed in C. For more information, see [Structures](../../c-language/structure-declarations.md) and [Unions](../../c-language/union-declarations.md).
 
 To resolve this error, create at least one member in your **`struct`** or **`union`**.
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2017.md b/docs/error-messages/compiler-errors-1/compiler-error-c2017.md
@@ -10,8 +10,12 @@ ms.assetid: 1083eed9-9906-4a97-883c-54e52d7e82cd
 
 > illegal escape sequence
 
+## Remarks
+
 An escape sequence, such as \t, appears outside of a character or string constant.
 
+## Examples
+
 The following sample generates C2017:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2019.md b/docs/error-messages/compiler-errors-1/compiler-error-c2019.md
@@ -10,8 +10,12 @@ ms.assetid: 4f37b1e1-9eca-418f-a4c3-141e8512d7b6
 
 > expected preprocessor directive, found 'character'
 
+## Remarks
+
 The character followed a `#` sign but it is not the first letter of a preprocessor directive.
 
+## Example
+
 The following sample generates C2019:
 
 ```cpp
diff --git a/docs/error-messages/compiler-errors-1/compiler-error-c2020.md b/docs/error-messages/compiler-errors-1/compiler-error-c2020.md
@@ -10,4 +10,6 @@ ms.assetid: 486f98ed-6574-4d82-89e3-74b5a61ed419
 
 > 'member' : 'class' member redefinition
 
+## Remarks
+
 A member inherited from a base class or structure is redefined. Inherited members cannot be redefined unless declared as **`virtual`** in the base class.
