• Paul (30/30) Mar 18 2007 Hello, I need to sort an array of structures into desending order
• Bertel Brander (20/28) Mar 18 2007 int compare_one(const void *v1, const void *v2)
• Paul (3/3) Mar 18 2007 Hi Bertel, thanks your code works fine.

Paul <wcount12 aol.com> writes:

Hello, I need to sort an array of structures into desending order
by an element declared as a float.  Here is my compare function
which im using with Qsort.
----------------------------------------------------------------
int compare_one(const void *v1, const void *v2)
{
    int return_value;

    return_value = (*(struct proform*)v1).eq_rating - (*(struct
proform*)v2).eq_rating;

    if(return_value < 0 )
    {
       return 28;
    }
    else if( return_value > 0 )
    {
       return -34;
    }
    else
    {
       return 0;
    }

    return return_value;
}
-----------------------------------------------------------

This is sorting as if the variables are int's rather than floats,
so the frational part is being ignored.

Question:  How do sort on a float variable this is part of a
structure?

Thanks

Paul

Bertel Brander <bertel post4.tele.dk> writes:

Paul skrev:
 Hello, I need to sort an array of structures into desending order
 by an element declared as a float.  Here is my compare function
 which im using with Qsort.

[Snip code]

 This is sorting as if the variables are int's rather than floats,
 so the frational part is being ignored.
 
 Question:  How do sort on a float variable this is part of a
 structure?

int compare_one(const void *v1, const void *v2)
{
     double return_value = (*(struct proform*)v1).eq_rating - (*(struct
proform*)v2).eq_rating;

     if(return_value < 0 )
     {
        return 1;
     }
     else if( return_value > 0 )
     {
        return -1;
     }
     return 0;
}

-- 
Just another homepage:
http://damb.dk
But it's mine - Bertel

Paul <wcount12 aol.com> writes:

Hi Bertel, thanks your code works fine.

Kind regards

Paul