Simple problem

This is a discussion on Simple problem within the C++ Programming forums, part of the General Programming Boards category; Hey guys. I have a string: char shortpath[1000]; That string above is a filepath. What I want to do is ...

  1. #1
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    Simple problem (solved)

    Hey guys. I have a string:

    char shortpath[1000];

    That string above is a filepath. What I want to do is figure out the files extension. In order to do this I'm guessing I would have to find the last 4 chars of the string. Then I would compare the last 4 chars with an extension like ".mp3", therefore confirming the file is an mp3. How exctly would I get those last 4 chars from it? I'm a C++ noob and I have treid for hours and not succeded. Thanks.
    Last edited by andrewmc; 10-06-2006 at 11:44 PM. Reason: solved

  2. #2
    Just Lurking Dave_Sinkula's Avatar
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    I'm a C guy, so using strrchr to find the last . in the string and then using strcmp on the remaining would be my start. C++ offers similar functions (as well as containing those I suggested). Post your attempt (preferably within code tags).
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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    I can't believe I didn't think of that.

    char* extension=strchr(shortpath,'.');

    That sucessfully returns the file extension. Only problem is that strcmp is case sensitive. It does not see the extension ".MP3" as equal to ".mp3". Any ideas?

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    Just Lurking Dave_Sinkula's Avatar
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    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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    You have been a HUGE help. I am forever in your debt :P

  6. #6
    Just Lurking Dave_Sinkula's Avatar
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    Quote Originally Posted by andrewmc
    char* extension=strchr(shortpath,'.');
    Note also that I mentioned strrchr rather than strchr.

    This may come into play if your file/directory text contains a ..
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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    Oops, that could have caused some problems. Thanks again for all your help.

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