Can we open .pdf or .doc from C++ using fstream?

Question

I am creating a project for an airline reservation using C++.
I created a function to print a passengers ticket, save it in a .txt or.htm file for viewing and change details later whenever needed...
But now, I thought It would be better to save such documents in a .doc or .pdf file...
So, can I open these files in the same way as the text files?
Are they accessible like normal .txt,.bin or .htm files?

Answer 1

No, C++ only allows .txt files to be opened.

Answer 2

https://www.sololearn.com/discuss/382114/?ref=app
Sorry for the late update...