sorting...

This is a discussion on sorting... within the C++ Programming forums, part of the General Programming Boards category; hi, I have an array of strings and want to be able to sort them alphabetically. I was wondering if ...

  1. #1
    Registered User headexplodes's Avatar
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    sorting...

    hi,

    I have an array of strings and want to be able to sort them alphabetically. I was wondering if someone could point me in the right direction. Are there any functions to assist me with this or do i have to write my own function from scratch?

    thanks, Robert.
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    Hi,
    I think that you would find it easier to make your own function which sorts the array alphabetically.

    My suggested sorting method is Bubble sort, since its short and easy.

    I will experiment with it for a bit and let you know on whether it is successful or unsuccessful.

    I hope you get it working
    tudehopet uses Borland Compiler 5.5
    and Visual C++ 6.

  3. #3
    and the hat of wrongness Salem's Avatar
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    Well for simple 'C' style arrays, there's a function called qsort() in stdlib.h

    If you're using fancy C++ STL containers, then there is a sort function in <algorithm>

  4. #4
    Registered User headexplodes's Avatar
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    thanks... i'm experimenting with qsort now.
    /* MSN and E-Mail - head_explodeshotmail.com */
    If Bill Gates got a dollar for every time windows crahsed... oh... he does.
    I always use MSVC++6.0

  5. #5
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    go to AI Horizon for all the different methods of sorting.
    You never know when you might need it.
    tudehopet uses Borland Compiler 5.5
    and Visual C++ 6.

  6. #6
    Registered User headexplodes's Avatar
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    i'm having trouble getting qsort() working...

    Code:
    char* allsongs[MAXSONGS];
    
    int compare( const void *arg1, const void *arg2 )
    {
       /* Compare all of both strings: */
       return _stricmp( * ( char** ) arg1, * ( char** ) arg2 );
    }
    
    qsort((void*)allsongs, 10, sizeof(char*), compare);
    this is my modification of the example given in the MSDN. but it gets an access voilation. (btw allsongs is sucessfully filled with about 300 strings)

    if i do the following:

    Code:
    sprintf("%s\n", allsongs[10]);
    it outputs a song fine. have i overlooked somthing?
    /* MSN and E-Mail - head_explodeshotmail.com */
    If Bill Gates got a dollar for every time windows crahsed... oh... he does.
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  7. #7
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    Do yourself a favor and have a look at the bubble sorting method, or another one.

    Just goto aihorizon.com and then click on Basic CS, there is a whole lot of algorithms for sorting.
    tudehopet uses Borland Compiler 5.5
    and Visual C++ 6.

  8. #8
    Registered User headexplodes's Avatar
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    thanks for all the help.. but i got qsort working. its seems fast enough for what i'm doing.
    /* MSN and E-Mail - head_explodeshotmail.com */
    If Bill Gates got a dollar for every time windows crahsed... oh... he does.
    I always use MSVC++6.0

  9. #9
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    Its always a pleasure sharing some of my knowledge.
    tudehopet uses Borland Compiler 5.5
    and Visual C++ 6.

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