LI-COR LI-6400, Руководство пользователя, Страница: 617 / 846

Programming with LPL
Public and Static
Using the LI-6400 22-23
Using STATIC
In large LPL applications, or in library files (files containing code that might
be used in any number of applications), it is often convenient to ÒhideÓ object
names from the rest of the application. Objects whose name is preceded by
the label
STATIC are defined only within the file containing them.
For example, consider a general purpose library file for graphing data. We
leave out all the details, and just outline it in terms of a few functions and vari-
ables. The interface to this package is the function
GenPlot
, that expects to
find the x and y data arrays on the stack, along with the x and y axes labels.
All of the functions and variables that
GenPlot might use are STATIC , to pre-
vent name conflicts with any application that might use this file.
:INT
abc 1
def 10 /* Private variables */
:FLOAT
PUB xyz 1.234 /* Public variable */
:FCT
Main
{
"UsePubVar"
RUN
/* run new program */
GETKEY DROP
}
:FCT
Main
{
xyz "The value of xyz is %d\n"
PRINT
}
Program #1
Program #2 (named "UsePubVar")
Figure 22-13. Program #1 calls Program #2, which knows about
variable
xyz because it was declared to be public.