ios::app vs ios::ate mode in file handling?

Question

In cpp I am kind of confused over these term i know app flag is used to append data at the end of a file but ate also does that so what's the difference?

Answer 1

edit
ate has more features
a resource/reference
https://www.tutorialspoint.com/cplusplus/cpp_files_streams.htm

Answer 2

This is the one I use most
http://www.cplusplus.com/doc/tutorial/files/

Answer 3

If that fails
http://en.cppreference.com/w/

Answer 4

Do you code on an IDE?

Answer 5

Yeah i use code blocks most of the time

Answer 6

The article doesn't provide sufficient info ......