Merge pull request #5047 from MicrosoftDocs/FromPublicMasterBranch

Confirm merge from FromPublicMasterBranch to main to sync with https://github.com/MicrosoftDocs/cpp-docs (branch main)

Author: PhilKang0704

docs/error-messages/compiler-errors-1/compiler-error-c2018.md

@@ -11,3 +11,21 @@ ms.assetid: 86b54573-dca0-4446-be1a-e3ac489c073b
 unknown character 'hexnumber'
 
 The source file contains an unexpected ASCII character, which is identified by its hex number. To resolve the error, remove the character.
+
+The following sample generates C2018:
+
+```cpp
+// C2018.cpp
+int main() {
+   @   // C2018
+}
+```
+
+Possible resolution:
+
+```cpp
+// C2018b.cpp
+int main() {
+
+}
+```

docs/error-messages/compiler-errors-1/compiler-error-c2023.md

@@ -12,3 +12,22 @@ helpviewer_keywords: ["C2023"]
 The compiler found an alignment specifier for a class type that's different from a previous declaration, or an **`enum`** alignment specifier that's different from the natural alignment of the base type.
 
 To resolve this error, make sure all declarations and definitions of the type use the same alignment value.
+
+The following sample generates C2023:
+
+```cpp
+// C2023.cpp
+class alignas(2) C;
+
+class alignas(4) C {};   // C2023
+```
+
+Possible resolution:
+
+```cpp
+// C2023b.cpp
+// compile with: /c
+class alignas(2) C;
+
+class alignas(2) C {};
+```

docs/error-messages/compiler-errors-1/compiler-error-c2024.md

@@ -12,3 +12,22 @@ helpviewer_keywords: ["C2024"]
 The compiler found an **`alignas`** specifier applied to a function or other type that can't be aligned.
 
 To resolve this error, remove the **`alignas`** specifier.
+
+The following sample generates C2024:
+
+```cpp
+// C2024.cpp
+namespace alignas(2) ns {   // C2024
+   void func(alignas(8) int x) {}   // C2024
+}
+```
+
+Possible resolution:
+
+```cpp
+// C2024b.cpp
+// compile with: /c
+namespace ns {
+   void func(int x) {}
+}
+```