Update definitions-and-declarations-cpp.md

Fixed typing error

Author: van9petryk

docs/cpp/definitions-and-declarations-cpp.md

@@ -43,7 +43,7 @@ __declspec( dllexport ) int i = 10;  // Okay--export definition
 #define DllImport   __declspec( dllimport )
 #define DllExport   __declspec( dllexport )
 
-extern DllImport int k; // These are both correct and imply a
+extern DllExport int k; // These are both correct and imply a
 DllImport int j;        // declaration.
 ```
 
@@ -71,4 +71,4 @@ void func() {
 **END Microsoft Specific**
 
 ## See Also
- [dllexport, dllimport](../cpp/dllexport-dllimport.md)
+ [dllexport, dllimport](../cpp/dllexport-dllimport.md)