Example of calling functions via jump tables?

[WAGREICH at BBNA.ARPA]

Could  someone  give  me  a  small  C  example  of how to declare
(addresses of) functions in a jump table and how to  use  a  jump
table  to call a function?  I would prefer an actual example to a
verbal explanation, or a pointer to a C program  that  uses  this
technique.

Thanks.