Help with combinations...

[mhaar@cymbal.calpoly.edu (Malcolm S Haar)]

I am trying develop a function that will return all n-length unique 
combinations of a given set of items.

My goal is:

function (pointer_to_list_of_items,n) return pointer_to_list_of_combinations

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if n = 2, and pointer_to_list_of_items points to a list:  A,B,C

then the function will return a pointer to:  A,B  A,C  B,C 
----     

The pointers, etc. are not of concern to me -- I know how to use them. Also, I can implement the function for a constant n. I would, however, like to be able to create a function like the one shown above, which would allow for any n.    


Thanks in advance for any help.

Malcolm
mhaar@oboe.calpoly.edu