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Old 04-22-2003, 09:47 PM   #1
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Registered: Apr 2003
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*comparison in C

Hi all,
I'm trying to write a bottom-up sort function, it has the same interface as qsort() in stdlib.h like that one
void qsort(type *base,int nel,int width,int (*compar)(type *,type *))

and I have read my data into an array of structs that have two members a char * and an int . My comparison functions work fie when I use qsort(), but because I have to write my own sort function(which has same interface as above), I can't seem to pass the correct arguments to the comparison function inside my sorting function, my comparison function has this interface
int intcompare( const void *i, const void *j)
int comparestr( const void *i, const void *j)
So in my sorting function I don't call either, rather I call compar, because my comparisons depend on whether the user wants to sort by int's or alphabetically. So I want to be able to pass to the comparison function aux[i] and aux[j] which are of type NODE which is my struct.

If you've read this far I appreciate your help. Thanks in advance
Old 04-22-2003, 10:37 PM   #2
Registered: Mar 2003
Location: PA
Distribution: Ubuntu (x2)
Posts: 158

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Did you include stdlib.h in your code?

If you did you may have problems since overloading is not supported by C.
Old 04-22-2003, 11:05 PM   #3
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Registered: Apr 2003
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I did include stdlib.h, but I don't think that is the problem because my problem is how do i pass in the NODE arg[i] and NODE arg[j] arguments into the specified comparison function


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