dcsimg
Login | Register   
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: Algorithms
Expertise: Beginner
Oct 29, 1998

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Making a file circular

Question:
I want to make a log file circular using C++ I/O manipulation. I am new to C++ and come from a C background. To me stream I/O is completely new, and it will take some time for me to digest these concepts.

If I were doing it in C, I would try using ftell(), fseek(), and rewind(). However, I would appreciate some ideas in C++.

Answer:
Unfortunately, there is really no such thing as a circular file. It would be up to you to program it.

Probably the easiest way is to create a class that writes the data only to memory. In memory, it would be much easier to delete and rearrange items. Then simply save the file to disk when you are finished.

Things get much more complicated if you do want to manipulate a file this way. You'll probably need to come up with a maximum length for each item. That way, you'll be able to go back and overwrite older items without overwriting the newer ones.

DevX Pro
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
×
We have made updates to our Privacy Policy to reflect the implementation of the General Data Protection Regulation.
Thanks for your registration, follow us on our social networks to keep up-to-date