C++ inserting data in a file

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# 1  
Old 08-07-2009
C++ inserting data in a file

Could anyone help me with an efficient(and easy) way to insert data in a file directly(with out using temp file).

open the file1.txt

and insert something say " 99999 " somewhere inside the file
333 99999 333

# 2  
Old 08-07-2009
If the file is relatively small you can read the entire file into memory and just write it out, inserting the new text at the appropriate place, using the original file name.
# 3  
Old 08-07-2009
...and if it isn't, you still can't just insert data, you have to update the entire file after the point of insertion.
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