Application Development Guide

Language Restrictions in FORTRAN

The following sections describe the FORTRAN language restrictions.

Call by Reference in FORTRAN

Some API parameters require addresses rather than values in the call variables. The database manager provides the GET ADDRESS, DEREFERENCE ADDRESS, and COPY MEMORY APIs which simplify your ability to provide these parameters. Refer to the Administrative API Reference for a full description of these APIs.

Debugging and Comment Lines in FORTRAN

Some FORTRAN compilers treat lines with a 'D' or 'd' in column 1 as conditional lines. These lines can either be compiled for debugging or treated as comments. The precompiler will always treat lines with a 'D' or 'd' in column 1 as comments.

Precompiling Considerations for FORTRAN

The following items affect the precompiling process:

• The precompiler allows only digits, blanks, and tab characters within columns 1-5 on continuation lines.
• Hollerith constants are not supported in .sqf source files.

Refer to the Application Building Guide for information on any other precompiling considerations that may affect you.