LI-COR LI-6400, Manual

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Programming with LPL
Pointers
22-18 Using the LI-6400
22
tions by using the
:PTR
declaration:
When run, this program will produce
5 500
You need not worry about the order of appearance when declaring PTR ob-
jects. Note that in Figure 22-7, for example, we declare
MyFct
as pointing at
Test1
, even though
Test1
has not yet been defined. This is allowed in LPL.
PTR Arrays
Pointer arrays are initialized with groups of object names. Thus, for example,
one can create a
PTR array by
:PTR stuff[] {abc MyFct maxLimit
nameList}
moreStuff[] {abc stuff}
Element of a PTR array can be different types of objects. Note that in the
above declaration, the 2
nd
element of
moreStuff
is itself a
PTR
array.
Pointer array declarations can also be nested. For example,
:PTR
theList[] {
:PTR
{ :INT[5] labelOne }
:PTR
{ :INT[5] labelTwo }
}
The
PTR
array
theList
has two elements, each one of which is an (unnamed)
:INT
a 5
b 10
/* MyFct assigned to Test1 */
:PTR
myFct Test1
/* myVal assigned to INT a */
myVal a
:FCT
Main
{
myVal myFct
/* MyFct assigned to Test2 */
&Test2 &MyFct =
myVal myFct
}
Test1 { "%d "
PRINT
}
Test2 { 100 * "%d "
PRINT
}
Figure 22-7. Some PTR declarations