Generic array manipulation routine

[Roger A. Hurwitz]

Hello, Cpersons;

I was hoping for some help on how to write a single C function
for manipulating arrays, that can be called without change for
arrays with elements of differing types.  For example, the
qsort() function I use in Borland's Turbo C seems to do this.
Borland's qsort() has the following syntax;

	void qsort (void *base, size_t nelem, size_t width, 
		int (*fcmp) (const void *, const void *));

Where _base_ is a pointer to the 0th element in the array, _nelem_
is the number of elements in the array, and _width_ is the size
in bytes of each array element.  Given these parameters, I suppose
one could cast the void pointer to a char pointer and manipulate
the elements byte-by-byte, but I was wondering if there is a "better"
approach.

Thanks in advance for any help,

Roger Hurwitz
hurwitz at enuxha.eas.asu.edu