Programming

hi i would like to know whether i can delete a part of a file in C
for eg. if my file contained
1234567890
and i want to delete
456
so that it becomes
1237890

is there a way i can do this.

well, one way i can achieve this is by creating a new file, copy whatever i want, then delete the old file and rename the new file with the name of the old file.
but i was wondering whether it can be done in directly, i.e. without doing any copies.

plz help
regards
Edit/Delete Message

The only method i know is the one u just wrote, but what if u can overwrite the unwanted characters by shifting the ones after them to the left, then insert the END OF FILE (EOF) in it's correct position? i don't know if it's possible, and there's the matter of space: will the file be shrinked or it'll remain the same size? because we're not "deleting" anything, we'r just changing the sequence of characters....

It is possible to move characters down with a read and write loop and you can call truncate() to shorten the file.