On Thu, 6 Mar 2008, Harold Hallikainen wrote:

> My understanding (which may be wrong) is that array and structure
> arguments to functions are passed as pointers to that array or structure
> (the address of the start of the array or structure) instead of passing
> the entire array or structure (which would be rather large).

The name of an array will decay to a pointer to the first element in
that array.  But that is not true for structures; if you pass a
structure to a function, the entire structure will be passed, and the
called function will receive a copy of the structure.

> So... it looks like I'm not understanding something! How do I pass a
> pointer to a particular element in an array of structures do I can modify
> the structure components?

Apply the & operator to the struct being passed.  This will pass a
pointer to the struct to the function.  In the function, you'll use
the -> operator instead of the . operator.

--
John W. Temples, III
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