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6 CHAPTER 1. The TOY(FD) System

• Uncompress the ﬁle toyfd.zip in your working directory (e.g.,

C:\SICSTUS382\bin\toyfd; observe that this path does not contain spaces!!);

• initiate a SICStus session and choose as working directory that identiﬁed by

TOYDIR;

• load TOY(FD) from the command line of SICStus by consulting the ﬁle toyfd,

i.e., from the SICStus prompt

| ?- [toyfd].

At this moment, SICStus loads all the libraries and archives necessary and will

show the prompt of TOY(FD) (i.e., ‘TOY(FD)>’) and a message for helping, as

follows:

TYPE "/h." FOR HELP.

TOY(FD)>

You are now inside TOY(FD)!!! i.e., you are now in the interpreter command

level of TOY(FD).

1.3 Interpreter Commands

At the interpreter command level you can type some predeﬁned commands and direc-

tives. In the following, we describe some of the most used. For a complete list see

Caballero et al., 1997.

All of these commands b egins with ‘/’ and ends with ‘.’. Blank spaces are not

allowed and they are interpreted as Prolog terms i.e., the arguments are enclosed

between normal brackets ‘(’,‘)’ and separated by commas ‘,’. Moreover, if the arguments

contains blank spaces or symbols like ‘/’ (e.g., to specify a path), then they must be

enclosed between simple inverted commas (’).

For example, the following commands are recognized by TOY(FD):

/compile(my_program).

/ compile( my_program ).

/load(one_of_my_programs).

/system(’cd ..’).

/cd(..).

/cd(’/home/local/bin’).

/q.

/help.

However, the following are not recognized:

/compile (my_program).

/cd(/home/local/bin).

/cd(../..).

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Ascend FD-23R Manual de usuario Pagina 18