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IBM System/360 User Manual

IBM System/360
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ASSIGN
ING
VALUES
TO
SYMBOLIC VALUES
If
the
command
procedure
contains
symbolic
values,
the
installation
should
provide
you
with
a
list
of
the
symbolic
values
used"
what
meaning
is
associated
with
each
symbolic
value,
whether
you
must
supply
an
actual
value
for
each
symbolic
value,
and
whether
a
symbolic
value
will
assume
a
default
value
if
you
fail
to
provide
one.
Figure
14
shows
a
sample
sheet
for
a command
procedure
such
as
your
installation
may
provide
you
r----------------------------------------------------------------------,
I Command
Procedure:
LISTUPDT
(member
name)
I
Purpose:
Update
inventory
list
I
Symbolic
values:
I
WEEKIN
WEEKOUT
NEW
OUTPUT(*)
I
I
WEEKIN:
Required.
Replace
with
name
of
input
data
set.
I
WEEKOUT:
Required.
Replace
with
name
of
output
data
set.
I NEW:
Optional.
Code
NEW
if
output
data
set
does
not
exist.
I Omi t
if
output
data
set
already
exists.
I OUTPUT<*):
Optional.
Directs
reports
prepared
by
procedure
to
I
your
terminal.
If
you
want
to
direct
reports
to
a
I
data
set,
replace
the
*
with
the
data
set
name.
If
I
OUTPUT
is
not
specified,
reports
go
to
a
central
I
printer.
L
_____________________________________________________________________
J
Figure
14.
symbolic
Values
for
a Command
Procedure
After
you
decide
which
values
you
are
going
to
replace
for
the
required
symbolic
values,
and
which
optional
symbolic
values
you
are
going
to
use,
enter
the
values
in
the
EXEC command used.
to
call
the
procedure.
The
values
must
follow
the
name
of
the
da
ta
set
or
member
that
contains
the
procedure.
If
the
procedure
resides
in
a
data
set,
enclose
the
values
in
apostrophes.
The
required
values
must
be
entered
in
the
order
given
to
you.
Optional
values
can
be
entered
in
any
order
after
you
enter
the
required
val
ues.
The
following
example
calls
the
procedure
shown
in
Figure
14.
The
name
of
the
input
data
set
is
JP.W26IN.DATA.
'l'he name
of
the
output
data
set
is
JP.W260UT.DATA.
The
output
data
set
does
not
yet
exist.
The
reports
produced
by
the
command
procedure
are
directed
to
the
JP.W26REP.DATA
data
set.
READY
listupdt
w26in
w260ut
output
(w26rep)
new
Note:
If
syntax
errors
or
certain
other
error
conditions
arise
in
executing
a command
within
a
procedure,
the
procedure
will
be
terminated
and
the
remaining
commands
will
not
be
executed.
Writing Command Procedures
FUnctions
that
are
performed
on
a
regular
basis,
such
as
calling
a
compiler,
can
be
simplified
when
the
commands
that
perform
the
fUnctions
are
kept
as
command
procedures.
Once
the
commands
are
placed
in
a
partitioned
or
sequential
data
set
or
in
a command
procedure
library
(a
partitioned
data
set),
any
terminal
user
who
wants
to
perform
those
functions
need
only
enter
an
EXEC
command.
Command
procedures
contain
commands
and,
optionally,
subcoromands,
data
and
line
numbers.
A command
procedure
may
also
contain
command
procedure
statements
(PROC,
WHEN,
and
END)
that
control
execution
of
the
procedure.
The
PROC
statement
defines
symbolic
values
in
the
procedure,.
The
WHEN
statement
initiates
or
terminates
a
procedure
according
to
certain
conditions.
The
END
statement
may
be
used
to
mark
the
end
of
the
procedure.
82
TSO
Terminal
User's
Guide
(Release
21.7)

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IBM System/360 Specifications

General IconGeneral
BrandIBM
ModelSystem/360
CategoryDesktop
LanguageEnglish

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