How to identify the file content as ASCII or binary

Question

How do you identify the file content as being in ASCII or binary using C++?

Answer 1

This question really has no right or wrong answer to it, just complex solutions that will not work for all possible text files.

Here is a link the a The Old New Thing Article on how notepad detects the type of ascii file. It's not perfect, but it's interesting to see how Microsoft handle it.