Reading multiple files in C

This is a discussion on Reading multiple files in C within the C Programming forums, part of the General Programming Boards category; I have the following problem: My program is supposed to read data from files to an array. The files are ...

  1. #1
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    Reading multiple files in C

    I have the following problem: My program is supposed to read data from files to an array. The files are numbered: capture[1].bmp,capture[2].bmp and so on. There are 24 of those files, and I really don't want to do the same step 24 times. Is there a way to write a loop along the lines of

    Code:
    for (int i=1; i<25, i++);
    {
    fp=fopen("capture[i].bmp", "rb");
    
    fread(&ch,sizeof(ch),1,fp);
    	
    .....
    }
    In other words, is there a way to insert the "i" variable into the filename?



    Thank you for your insights.

  2. #2
    and the hat of wrongness Salem's Avatar
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    Code:
    for (int i=1; i<25, i++)
    {
    char fn[100];
    sprintf(fn,"capture&#37;d.bmp", i );
    fp=fopen(fn, "rb");
    
    fread(&ch,sizeof(ch),1,fp);
    	
    .....
    }
    Use sprintf() to generate the filename.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  3. #3
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    If the files have the names as given in the original post, I suppose:
    Code:
    sprintf(fn,"capture[%d].bmp", i );
    would be what original poster wanted.

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    Mats
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    thanks for ur replies...............

    but if that is the case............where can i specify the path name

  5. #5
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    In the sprintf statement, perhaps?

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  6. #6
    Fear the Reaper...
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    Example :

    sprintf(fn,"/usr/home/capture%d.bmp".i)

    say you loop through that with i having a value of 0, 1, and 2.
    fn, then, in turn, will have :

    /usr/home/capture0.bmp
    /usr/home/capture1.bmp
    /usr/home/capture2.bmp

    That should get you what you want. Also, you may need to put in some escape characters like '\\' depending on what platform you're using.
    Teacher: "You connect with Internet Explorer, but what is your browser? You know, Yahoo, Webcrawler...?" It's great to see the educational system moving in the right direction

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    Thank you

    Thanks for ur reply..............it's working

  8. #8
    and the hat of wrongness Salem's Avatar
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    Can you cut out the "ur" kiddie English and repeated dots - thanks.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  9. #9
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    ok

    ok,thanks for your suggestion

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