HP Pascal/iX Reference Manual (31502-90022)

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more information.
In order for a procedure in a module to read from input or write to
output (for example, readln from input or writeln to output ), that module
must import the standard modules stdinput or stdoutput , respectively.
On HP-UX the standard modules stdinput , stdoutput , and stderr are
contained in the predefined library /usr/lib/paslib. On MPE/iX the
standard modules stdinput and stdoutput are contained in the predefined
library PASLIB.PUB.SYS.
When a program, either directly or indirectly, imports a module that
imports stdinput or stdoutput , the program must specify input or output ,
respectively, in the program parameter. If a program does not specify
input or output and a module imports the standard modules, the program
will not link.
On HP-UX only, if a program, either directly or indirectly, imports a
module that imports stderr , the program must specify stderr in the
program parameter. If a program does not specify stderr and a module
imports the standard module stderr , the program will not link. In
addition, if a procedure in a module writes to stderr , that module must
import the standard module, stderr .
Syntax
Module_declaration:
Example
This example shows a source file that contains definitions for the
modules bit_types and char_info. MODULE bit_types and MODULE char_info
are compiled into an object file called mod1.o. Note that mod1.o is
referenced in the examples in section "IMPORT" .
MODULE bit_types; { Module declaration }