Thread: Append one file to another.

  1. #1
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    Append one file to another.

    Hello.

    I wonder if it is possible to append one file to another. Something like this:

    FILE *text_file
    FILE *aux_file;

    text_file = fopen(filename, "w+");
    .....
    aux_file = funct_return_file();
    .....

    Then I would like to append aux_file to text_file

    Thanks in advance for your suggestions.

  2. #2
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    if both files are just text files, which has no headers it maybe work, but if not you will have a corrupted new file
    Mac OS 10.6 Snow Leopard : Darwin

  3. #3
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    Yes, they would be two simple text files.

  4. #4
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    i don't think there is a appending function... not as far as i now.
    You can use fread and fwrite
    Mac OS 10.6 Snow Leopard : Darwin

  5. #5
    and the hat of sweating
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    Use "a" or "a+" to open a file for append.
    http://www.cppreference.com/stdio/fopen.html

  6. #6
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    So maybe if I use FILE *text_file as a global/extern variable, I can write to just one file from different functions instead of appending?

  7. #7
    Hurry Slowly vart's Avatar
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    Quote Originally Posted by guillermoh View Post
    So maybe if I use FILE *text_file as a global/extern variable, I can write to just one file from different functions instead of appending?
    Better to pass it as a parameter to these functions...

    And still - you need to append to "append one file to another"
    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    David J. Wheeler

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