Noob: needs help with file I/O

This is a discussion on Noob: needs help with file I/O within the C Programming forums, part of the General Programming Boards category; Hi all, I'm having a prob with loading a file into an array. I'm fine with opening the file but ...

  1. #1
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    Noob: needs help with file I/O

    Hi all,

    I'm having a prob with loading a file into an array.

    I'm fine with opening the file but when it come to the fread command i seem to be failing as the document size will be variable, so how can i state a file size as "num_of_elements".

    if this is not clear, then my basic idea is:

    i want to open a file in 128 bit chunks and load it into an array so i can perform function on the array. Thats about it.

    I would provide code, but i've butchered it that much it aint much use.

    any help would be greatly appreciated.

    cheers.

  2. #2
    and the hat of wrongness Salem's Avatar
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    Code:
    char buff[128];
    while ( fread ( buff, sizeof buff, 1, in ) == 1 ) {
      // got a 128 byte buff
    }
    Did you remember to open the file in binary mode?

  3. #3
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    cheers for the reply,

    yeah I have opened the file using the identifiers "rb" so should be operating in binary mode.

    Will take a look at implementing the code when i get chance.

    Many thanks

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