Hi, i am doing some work with files in C/C++ and i wonder if there is some way, how to remove a word (array of chars) from a file. Thanks for any suggestions.

Well to start off, do you know how to open and read characters and strings froma a file in c++?
If not, search this forum for examples using '#include <fstream>'
There happens to be a thread with a good short example VERY close by right now.

Yes, I know how to read from a file. I just need a better solution for removing words from files than load the whole file into the memory, delete the words I want, and store it back to file.

Well then, get familiar with these iostrean class functions: cplusplus.com/reference/iostream/iostream/ ,,,,or ..../fstream/
All kinds of fun stuff in there. Find a way to 'get' whole words from a stream (hint hint).
If I didn't want to store and manipulate the file data in memory I think I might just:
Why don't you write something and post back when you run into problems.