Thread: Print Hexadecimal Numbers Of a File

  1. #1
    Trying to Learn C nathanpc's Avatar
    Join Date
    Jul 2009

    Question Print Hexadecimal Numbers Of a File

    I'm now developing a home project, but before I start, I need to know how can I print the content of a file(*.bin as example) in hexadecimal.

    I like to learn, then a good tutorial is very nice too

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    Nathan Paulino Campos
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  2. #2
    Registered User
    Join Date
    Sep 2006
    x for lowercase hex letters, X for uppercase letters

    Google is your friend for all kinds of C and C++ online tutorials.

  3. #3
    Registered User
    Join Date
    Feb 2009
    I'm not sure but I suggest reading every character and then using the printf function with %hhx to print every byte of the file.
    for example:
    char c
    while file has next
    c = next character
    printf("%hhx", c)

    That's what I would try first.

  4. #4
    Woof, woof! zacs7's Avatar
    Join Date
    Mar 2007
    You'd probably want to fread() BUFSIZ bytes at a time ("The value of BUFSIZ is chosen on each system so as to make stream I/O efficient."). Then use printf() as above -- although that might be a little slow depending on how many characters you have.

  5. #5
    Officially An Architect brewbuck's Avatar
    Join Date
    Mar 2007
    Portland, OR
    If Linux:

    od -t x1 filename.bin
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);

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