Passing types to a subroutine

[Doug Gwyn]

In article <14457 at mimsy.UUCP> sjr at mimsy.UUCP (Stephen J. Roznowski) writes:
>	float	a[100];
>	subroutine(...., a[100], ...);

>	double	a[100];
>	subroutine(...., a[100], ...);

>subroutine(....,array,....)
>[???]	*array;

>How do you pass the knowledge of the array type to the
>subroutine?

You don't.  Types are dealt with at compile time, not run time.
It is in fact possible for a pointer-to-float to be passed
differently than a pointer-to-double.

If you REALLY have to do this, consider casting the arguments
(which should be "a", not "a[100]") to type pointer-to-void or
pointer-to-char, and add another parameter to the subroutine
that can be used to indicate how to "un-cast" the funny
parameter.  The code for this won't be clean..