/[no]f66

Syntax:

/f66 or /nof66

The /f66 option requests that the compiler select FORTRAN-66 interpretations in cases of incompatibility (default is /nof66). Differences include the following:

• DO loops are always executed at least once (see Execution of DO Constructs)
• FORTRAN-66 EXTERNAL statement syntax and semantics are allowed (see FORTRAN-66 Interpretation of the External Statement)
• If the OPEN statement STATUS specifier is omitted, the default changes to STATUS='NEW' instead of STATUS='UNKNOWN'
• If the OPEN statement BLANK specifier is omitted, the default changes to BLANK='ZERO' instead of BLANK='NULL'

In the visual development environment, specify Enable FORTRAN-66 Semantics in the Fortran Language Compiler Option Category.