Implement “tail -f” in C++

Question

I want to create a small code in C++ with the same functionality as \"tail-f\": watch for new lines in a text file and show them in the standard output.

The idea is

Answer 1

Just keep reading the file. If the read fails, do nothing. There's no need to repeatedly open and close it. However, you will find it much more efficient to use operating system specific features to monitor the file, should your OS provide them.