SIMSCRIPT II.5 Programming Language

Programming Language Concepts
MAIN PROGRAM
SUBPROGRAM
SUBPROGRAM
END
Figure 2-5a. Program Consisting of a Subprogram Called by a Main Routine
In Figure 2-5a, the main routine calls on the subprogram in two places. In each instance, after executing
its statements, the subprogram returns control to the main routine at the statement following
the one that called it.
Figure 2-5b shows a slightly more complicated program composed of a main routine and two subprograms.
The main routine calls on each of the subprograms. They are independent of each other.
MAIN PROGRAM
SUBPROGRAM
1
SUBPROGRAM
2
SUBPROGRAM 1
END
Figure 2-5b. Program Consisting of Two Subprograms Called by a
Main Routine
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