Add language identifiers

Author: nxtn

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4185.md

@@ -13,7 +13,7 @@ The attribute is not a valid attribute of `#import`. It is ignored.
 
 ## Example
 
-```
+```cpp
 // C4185.cpp
 // compile with: /W1 /c
 #import "stdole2.tlb" no_such_attribute   // C4185

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4186.md

@@ -13,7 +13,7 @@ A `#import` attribute has the wrong number of arguments.
 
 ## Example
 
-```
+```cpp
 // C4186.cpp
 // compile with: /W1 /c
 #import "stdole2.tlb" no_namespace("abc") rename("a","b","c")  // C4186

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4215.md

@@ -13,7 +13,7 @@ The default Microsoft extensions (/Ze) treat **long float** as **double**. ANSI
 
 The following sample generates C4215:
 
-```
+```cpp
 // C4215.cpp
 // compile with: /W1 /LD
 long float a;   // C4215

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4216.md

@@ -11,7 +11,7 @@ nonstandard extension used : float long
 
 The default Microsoft extensions (/Ze) treat **float long** as **double**. ANSI compatibility ([/Za](../../build/reference/za-ze-disable-language-extensions.md)) does not. Use **double** to maintain compatibility. The following sample generates C4216:
 
-```
+```cpp
 // C4216.cpp
 // compile with: /W1
 float long a;   // C4216

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4218.md

@@ -13,7 +13,7 @@ With the default Microsoft extensions (/Ze), you can declare a variable without
 
 ## Example
 
-```
+```cpp
 // C4218.c
 // compile with: /W4
 i;  // C4218

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4224.md

@@ -13,7 +13,7 @@ The identifier was previously used as a `typedef`. This causes a warning under A
 
 ## Example
 
-```
+```cpp
 // C4224.cpp
 // compile with: /Za /W1 /LD
 typedef int I;

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4227.md

@@ -13,7 +13,7 @@ Using qualifiers like `const` or `volatile` with C++ references is an outdated p
 
 ## Example
 
-```
+```cpp
 // C4227.cpp
 // compile with: /W1 /c
 int j = 0;

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4228.md

@@ -13,7 +13,7 @@ Use of qualifiers like **const** or `volatile` after a comma when declaring vari
 
 ## Example
 
-```
+```cpp
 // C4228.cpp
 // compile with: /W1
 int j, const i = 0;  // C4228

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4229.md

@@ -13,7 +13,7 @@ Using a Microsoft modifier such as `__cdecl` on a data declaration is an outdate
 
 ## Example
 
-```
+```cpp
 // C4229.cpp
 // compile with: /W1 /LD
 int __cdecl counter;   // C4229 cdecl ignored

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4230.md

@@ -13,7 +13,7 @@ Using a qualifier before a Microsoft modifier such as `__cdecl` is an outdated p
 
 ## Example
 
-```
+```cpp
 // C4230.cpp
 // compile with: /W1 /LD
 int __cdecl const function1();   // C4230 const ignored

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4237.md

@@ -13,7 +13,7 @@ A keyword in the C++ specification is not implemented in the Microsoft C++ compi
 
 The following sample generates C4237:
 
-```
+```cpp
 // C4237.cpp
 // compile with: /W1 /c
 int export;   // C4237

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4258.md

@@ -11,7 +11,7 @@ ms.assetid: bbb75e6d-6693-4e62-8ed3-b006a0ec55e3
 
 Under [/Ze](../../build/reference/za-ze-disable-language-extensions.md) and [/Zc:forScope](../../build/reference/zc-forscope-force-conformance-in-for-loop-scope.md), variables defined in a [for](../../cpp/for-statement-cpp.md) loop go out of scope after the **for** loop ends. This warning occurs if a variable with the same name as the loop variable, but defined in the enclosing loop, is used again in the scope containing the **for** loop. For example:
 
-```
+```cpp
 // C4258.cpp
 // compile with: /Zc:forScope /W1
 int main()

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4269.md

@@ -13,7 +13,7 @@ A **const** automatic instance of a non-trivial class is initialized with a comp
 
 ## Example
 
-```
+```cpp
 // C4269.cpp
 // compile with: /c /LD /W1
 class X {

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4272.md

@@ -13,7 +13,7 @@ It is an error to export a function marked with the [__clrcall](../../cpp/clrcal
 
 The following sample generates C4272:
 
-```
+```cpp
 // C4272.cpp
 // compile with: /c /W1 /clr
 __declspec(dllimport) void __clrcall Test();   // C4272

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4273.md

@@ -15,7 +15,7 @@ Two definitions in a file differ in their use of [dllimport](../../cpp/dllexport
 
 The following sample generates C4273.
 
-```
+```cpp
 // C4273.cpp
 // compile with: /W1 /c
 char __declspec(dllimport) c;
@@ -26,7 +26,7 @@ char c;   // C4273, delete this line or the line above to resolve
 
 The following sample generates C4273.
 
-```
+```cpp
 // C4273_b.cpp
 // compile with: /W1 /clr /c
 #include <stdio.h>

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4286.md

@@ -13,7 +13,7 @@ The specified exception type is handled by a previous handler. The type for the
 
 ## Example
 
-```
+```cpp
 //C4286.cpp
 // compile with: /W1
 #include <eh.h>

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4288.md

@@ -15,7 +15,7 @@ See [/Zc:forScope](../../build/reference/zc-forscope-force-conformance-in-for-lo
 
 The following sample generates C4288:
 
-```
+```cpp
 // C4288.cpp
 // compile with: /W1 /c /Zc:forScope-
 int main() {

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4291.md

@@ -17,7 +17,7 @@ If you use the operator **new** without any extra arguments and compile with [/G
 
 If you use the placement form of the **new** operator (the form with arguments in addition to the size of the allocation) and the object's constructor throws an exception, the compiler will still generate code to call operator **delete**; but it will only do so if a placement form of operator **delete** exists matching the placement form of the operator **new** that allocated the memory. For example:
 
-```
+```cpp
 // C4291.cpp
 // compile with: /EHsc /W1
 #include <malloc.h>

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4293.md

@@ -15,7 +15,7 @@ If a shift count is negative or too large, the behavior of the resulting image i
 
 The following sample generates C4293:
 
-```
+```cpp
 // C4293.cpp
 // compile with: /c /W1
 unsigned __int64 combine (unsigned lo, unsigned hi) {

docs/error-messages/compiler-warnings/compiler-warning-level-1-c4297.md

@@ -19,7 +19,7 @@ This warning is also generated for __declspec([dllexport](../../cpp/dllexport-dl
 
 The following sample generates C4297:
 
-```
+```cpp
 // C4297.cpp
 // compile with: /W1 /LD
 void __declspec(nothrow) f1()   // declared nothrow