Mikroelektronika MIKROE-350 Fiche De Données

A function can be declared without having it followed by it's implementation, by hav-
ing it followed by the forward procedure. The effective implementation of that func-
tion must follow later in the module. The function can be used after a forward dec-
laration as if it had been implemented already. The following is an example of a for-
ward declaration:

program Volume

dim Volume as word

sub function First(a as word, b as word) as word forward

sub function Second(c as word) as word
dim tmp as word

tmp = First(2, 3)

result = tmp * c

sub function First(a, b as word) as word

result = a * b

Volume = Second(4)

135

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5