FORTRAN Reference Manual

FORTRAN Reference Manual—528615-001
1-1
1 Summary of HP Extensions
HP FORTRAN for NonStop systems implements the full ANSI FORTRAN 77 (X3.9-
1978) language. In addition, HP FORTRAN extensions to the ANSI standard enable
you to:
•
Use 31-character identifier names.
•
Use RECORD declarations to define and reference data structures containing data
of different types.
•
Combine procedures written in C, COBOL85, FORTRAN, Pascal, and TAL into an
executable program.
•
Write fault-tolerant programs.
•
Access key-sequenced, relative, and entry-sequenced files by primary or alternate
keys, and make full use of the ENSCRIBE facilities.
•
Use standard READ and WRITE statements to communicate with other processes.
•
Invoke Guardian system procedures as if they were FORTRAN subroutines.
•
Use the Binder, Crossref, and Inspect development tools.
•
Access extended data storage and use large common and local data blocks.
These features are described briefly in these topics:
Topic Page
Character Set and Identifier Names
1-2
Data Types 1-2
Procedures 1-2
Input and Output Operations 1-2
Files 1-3
Access to Operating System Procedures 1-3
Mixed-Language Programming 1-4
Memory Management 1-4
Fault-Tolerant Programming 1-4
Interprocess Communication 1-4