CALL GetArg(Pos, Value)
Pos: INTEGER; scalar; INTENT(IN).
Value: CHARACTER; scalar; INTENT(OUT).
Intrinsic groups: unix.
Description:
Sets Value to the Pos-th command-line argument (or to all
blanks if there are fewer than Value command-line arguments);
CALL GETARG(0, value) sets value to the name of the
program (on systems that support this feature).
See section IArgC Intrinsic, for information on how to get the number of arguments.
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