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Hi,

I want to create a file if its not exist and nees to open it in append mode.
so fopen with "a+" works for creation and appending a file?

Help me out.
Thanks in advance.
Posted 2-May-10 20:33pm
Edited 2-May-10 20:34pm
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Solution 3

You can also refer at cprogramming.com[^] for a brief reference on fopen() stdio.h function in C,and its modes.

Abstract: «
r - open for reading
w - open for writing (file need not exist)
a - open for appending (file need not exist)
r+ - open for reading and writing, start at beginning
w+ - open for reading and writing (overwrite file)
a+ - open for reading and writing (append if file exists)

To open a file in a binary mode you must add a b to the end of the mode string; for example, "rb" (for the reading and writing modes, you can add the b either after the plus sign - "r+b" - or before - "rb+")».

The link also happens to include brief references to fclose(),but also to fprintf(),fscanf(),fputc(),fgetc() for flow(or serial,I am not sure for this english term)files and to fread() and fwrite() for binary files.
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Solution 1

Poonamol wrote:
fopen with "a+" works for creation and appending a file

Yes!

"a+": Open a file for reading and appending. All writing operations are performed at the end of the file, protecting the previous content to be overwritten. You can reposition (fseek, rewind) the internal pointer to anywhere in the file for reading, but writing operations will move it back to the end of file. The file is created if it does not exist.
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Solution 2

Thanks a lot for you reply.
Working fine!!!!!!!!!!!!
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