Fix broken examples in filesystem navigation

Author: Colin Robertson

docs/standard-library/file-system-navigation.md

@@ -1,6 +1,7 @@
 ---
 title: "File System Navigation"
-ms.date: "11/04/2016"
+description: "How to use the C++ Standard library filesystem APIs to navigate the file system."
+ms.date: "04/13/2020"
 ms.assetid: f7cc5f5e-a541-4e00-87c7-a3769ef6096d
 ---
 # File System Navigation
@@ -48,14 +49,14 @@ The path class has several methods that return information about various parts o
 
 ```cpp
 // filesystem_path_example.cpp
-// compile by using: /EHsc
+// compile by using: /EHsc /W4 /permissive- /std:c++17 (or /std:c++latest)
 #include <string>
 #include <iostream>
 #include <sstream>
 #include <filesystem>
 
 using namespace std;
-using namespace std::experimental::filesystem;
+using namespace std::filesystem;
 
 wstring DisplayPathInfo()
 {
@@ -82,7 +83,7 @@ wstring DisplayPathInfo()
     return wos.str();
 }
 
-int main(int argc, char* argv[])
+int main()
 {
     wcout << DisplayPathInfo() << endl;
     // wcout << ComparePaths() << endl; // see following example
@@ -152,18 +153,18 @@ A `path` object is implicitly convertible to `std::wstring` or `std::string`. Th
 
 ```cpp
 // filesystem_path_conversion.cpp
-// compile by using: /EHsc
+// compile by using: /EHsc /W4 /permissive- /std:c++17 (or /std:c++latest)
 #include <string>
 #include <iostream>
 #include <fstream>
 #include <filesystem>
 
 using namespace std;
-using namespace std::experimental::filesystem;
+using namespace std::filesystem;
 
-int main(int argc, char* argv[])
+int main()
 {
-    wchar_t* p = L"C:/Users/Public/Documents";
+    const wchar_t* p{ L"C:/Users/Public/Documents" };
     path filePath(p);
 
     filePath /= L"NewFile.txt";