“No newline at end of file” compiler warning

Question

What is the reason for the following warning in some C++ compilers?

No newline at end of file

Why should I have an empty line at

Answer 1

That's not an error. It's just a warning.

Open the file in an editor, go to the last line of the file, and hit enter to add a blank line to the end of the file.

Though, besides that, you should be using #include instead of . Then put in a using std::cout; after it.