HP Fortran Programmer's Reference (September 2007)

HP Fortran statements

AUTOMATIC (extension)

Chapter 10280

AUTOMATIC (extension)

Makes procedure variables and arrays automatic.

Syntax

AUTOMATIC

var-name-list

is a comma-separated list of names of variables and arrays to be declared as

automatic. Array names may be followed by an optional

explicit-shape-spec

Description

The AUTOMATIC statement is provided as an HP extension.

If a variable or array declared within a procedure is declared as automatic, then there is one

copy of it for each invocation of the procedure. Space is allocated on entry to the procedure and

deallocated on exit. This is also the default for variables that do not have the SAVE or STATIC

attribute, unless the +save option has been speciﬁed.

If it is required to have the

same

copy of a variable available to each invocation of the routine

(for example, to keep a record of the depth of recursion), then the variable should have the

SAVE attribute.

Note the following:

• The AUTOMATIC statement may only be used within a procedure.

• Local variables are AUTOMATIC by default.

• Arguments and function values are AUTOMATIC.

• Automatic variables may not appear in EQUIVALENCE, DATA or SAVE statements.

• The AUTOMATIC attribute is not the same as automatic arrays and automatic character

strings.

Examples

AUTOMATIC r, s, u, v, w(10)

Related statements

SAVE and STATIC