SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Programming Language
7. Declaration:
every PERSON has an AGE(1/4), owns a FAMILY, has a
(NAME(2/4) and WEIGHT (2/2))
Entity structure:
AGE
NAME
WEIGHT
F.FAMILY
L.FAMILY
N.FAMILY
Field and bit packing of integer attributes of permanent entities and subscripted system attributes
places two or more attributes in each element of the same array. The declaration:
permanent entities
every HOUSE has an ( ADDRESS(1/2), and ZIP(2/2) )
places similarly indexed values of ADDRESS and ZIP in the same location.
This preamble declaration allows the executable statement create every HOUSE(5) to allocate
storage as shown in figure 6-10.
ADDRESS(1) ZIP(1) element 1
ADDRESS(2) ZIP(2) element 2
ADDRESS(3) ZIP(3) element 3
ADDRESS(4) ZIP(4) element 4
ADDRESS(5) ZIP(5) element 5
Figure 6-10. Entity Storage
More than one set of attributes, of course, may be packed in a single every statement; for example:
every SHIP has a ( TONNAGE(1/2), CAPACITY(2/2) ),
a ( DESTINATION(1/2), HOME.PORT(2/2) )
This statement pairs the attributes TONNAGE and CAPACITY and the attributes DESTINATION and
HOME.PORT within the elements of two attribute arrays. Some additional examples follow.
normally mode is integer
permanent entities
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