Merge pull request #2841 from corob-msft/cr-vs4296

Fix from VS4296 PR in C6054 sample

Author: v-shils

docs/code-quality/c6054.md

@@ -1,6 +1,7 @@
 ---
 title: C6054
-ms.date: 11/04/2016
+description: "Reference guide to Microsoft C++ code analysis warning C6054."
+ms.date: 04/22/2020
 ms.topic: reference
 f1_keywords: ["C6054"]
 helpviewer_keywords: ["C6054"]
@@ -10,38 +11,41 @@ ms.assetid: d573a5c1-7e74-402b-92e6-8085f967aa50
 
 > warning C6054: string \<variable> may not be zero-terminated
 
-This warning indicates that a function that requires zero-terminated string was passed a non-zero terminated string. A function that expects a zero-terminated string will go beyond the end of the buffer to look for the zero. This defect might cause an exploitable buffer overrun error or crash. The program should make sure that the string ends with a zero.
+## Remarks
+
+This warning indicates that a function that requires a zero-terminated string was passed a non-zero terminated string. A function that expects a zero-terminated string could look for the zero beyond the end of the buffer. This defect might cause an exploitable buffer overrun error or crash. The program should make sure the string passed in ends with a zero.
 
 ## Example
 
 The following code generates this warning:
 
 ```cpp
-
+// C6054_bad.cpp
+// Compile using: cl /W4 /EHsc /c /analyze C6054_bad.cpp
 #include <sal.h>
 
 void func( _In_z_ wchar_t* wszStr );
 
 void g ( )
 {
-    wchar_t wcArray[200];
+    wchar_t wcArray[200] = { 'h', 'e', 'l', 'l', 'o' };
     func(wcArray); // Warning C6054
 }
 ```
 
 To correct this warning, null-terminate `wcArray` before calling function `func()` as shown in the following sample code:
 
 ```cpp
-
+// C6054_good.cpp
+// Compile using: cl /W4 /EHsc /c /analyze C6054_good.cpp
 #include <sal.h>
 
 void func( _In_z_ wchar_t* wszStr );
 
-void g( )
+void g ( )
 {
-    wchar_t wcArray[200];
-    wcArray[0]= '\0';
-    func(wcArray);
+    wchar_t wcArray[200] = { 'h', 'e', 'l', 'l', 'o', '\0' };
+    func(wcArray); // OK
 }
 ```