info: mkdir(const char *path)

This is a discussion on info: mkdir(const char *path) within the C Programming forums, part of the General Programming Boards category; Hello :-) I'm an engineer (mechanic) so Cprogramming is not my job, and my question can sound silly to most ...

  1. #1
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    info: mkdir(const char *path)

    Hello :-)

    I'm an engineer (mechanic) so Cprogramming is not my job, and my question can sound silly
    to most of you. Please understand and thank you in advance.

    My problem is:

    I get a FileList.txt on argv[1], for example:

    C:\F00\Pippo_Folder\Pippo_Data\PippoData001.dat
    C:\F00\Robin_Folder\Robin_Data\RobinData005.dat
    C:\F00\Batman_Folder\Batman_Data\BatmanData100.dat
    etc..

    I want to fopen(_argv[1],"r") then fopen(first_file,"rb"); and that's OK, I can do that.

    My problem is that after reading the file I need to create a NewFile.dat with the same name
    and "same Path" but to a new folder, for example i need this kind of output:

    C:\F01\Pippo_Folder\Pippo_Data\PippoData001.dat
    C:\F01\Robin_Folder\Robin_Data\RobinData005.dat
    C:\F01\Batman_Folder\Batman_Data\BatmanData100.dat

    (note F00 changed to F01..)

    of course when i try to fopen(NewFile_in_NewPath,"wb") i get my warning
    "cannot open file.." .. beacuse the NewPath doesn't exist yet.(I think)

    So i tried to use the function mkdir(const char *path) but i cant get it right
    It seem not so easy( to me ) to automatically create folders from C code.


    Any tips ?
    ThankYou Paolo

  2. #2
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    You should be able to do that with mkdir() - can you post the code where you try to create the path?

    --
    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.

  3. #3
    CSharpener vart's Avatar
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    probably you should create one folder at a time
    Firstly you create
    C:\F01

    Then
    C:\F01\Pippo_Folder

    And at last
    C:\F01\Pippo_Folder\Pippo_Data
    The first 90% of a project takes 90% of the time,
    the last 10% takes the other 90% of the time.

  4. #4
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    I didnt write yet the code to build the string I need, at the moment ( just to try mkdir function ) I wrote this code taking the info from my compiler (DevC++)

    Code:
    #include <stdio.h>
    
    int main()
    {
       const char path[256] = "c:\\F01\\New";
       if (mkdir (path) != 0) printf("Fail Retry");
       return 0 ;
    }
    And simply doesn't create anything.
    I tried to find info or examples but the much info I get the more confused I am.
    Some examples I found where very tricky and full of flags; Is really this difficult?

    Thanks P

  5. #5
    CSharpener vart's Avatar
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    As I said - try to build path step by step
    The first 90% of a project takes 90% of the time,
    the last 10% takes the other 90% of the time.

  6. #6
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    Right, I take it that NEITHER "f01" nor "new" exists, right? You can't create multiple levels of directories with mkdir - I just tried it on my machine with your code, and it fails. If I change it to create only F01 then it works.

    --
    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.

  7. #7
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    Quote Originally Posted by vart View Post
    As I said - try to build path step by step
    :-) Yes It works :-)

    Thanks ! You make me Happy

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