When this basic method has been worked out, more advanced techniques using
several Prolog file editors, if necessary, and different directories can be
tried out. The same technique can be used with development in other Prolog
variants and other langauges, of course. It is not limited to SWI Prolog; this
Prolog implementation is a particularly good example.
With other languages which are not installed with an automatic execution
facility, the files should have an extension which is not otherwise recognised
by Win95. Clicking on the file then initiates a Win95 dialogue request for the
correct programme for handling the file; the correct programme should then be
entered. To ensure that the output lands in the correct directory, it may be
necessary to supplement the filename "SWIlog.txt" with an absolute path name,
e.g.:
"tell('c:\MyPrologDirectory\SWIlog.txt')".
Advanced programmers will have no need of these hints, but for beginning
programmers the technique provides a not too complicated introduction to the
use of multiple tasks in programme development.