home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Power-Programmierung
/
CD1.mdf
/
magazine
/
nvdc87
/
lcv1n1
/
variance.pro
< prev
Wrap
Text File
|
1987-08-11
|
1KB
|
38 lines
/* Listing 4 - Turbo Prolog main module to call Turbo C to calculate
the variance. The variance is passed back to Turbo
Prolog as a real */
domains
ilist=real*
ifunc=real
database
answer(real)
global predicates
cpinit language c /* declare Turbo C initialization */
/* module, cpinit */
variance(ilist,ifunc) - (i,o) language c
/* declare Turbo C module, variance */
predicates
main
process(ilist)
goal
cpinit, /* cpinit must be invoked before we call the */
main. /* TC function. */
clauses
main:-
List = [1.0,5.0,10.0,14.0],
process(List).
process(List):-
variance(List,Answer), /* Pass the list to variance */
Answer > 10, /* Then, the condition succeeds */
write(Answer).
process(_):- /* Else, say it doesn't */
write("Condition fails.").