On Sat, 13 May 2017, Lawrence Stewart wrote:

> * - But I have never been able to remember the syntax for function 
> pointers.  I always “man qsort” to refresh my memory.

"cdecl" is your friend:

    % cdecl
    Type `help' or `?' for help
    declare foo as pointer to function (int, double) returning void
    void (*foo)(int , double )

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."