Enhanced I/O: Using the assign Environment

Fortran programs often need the ability to alter details of a file connection, such as device residency, an alternative file name, a file space allocation scheme or structure, or data conversion properties. These file connection details taken together comprise the assign environment, and they can be modified by using the assign command and assign library interface.

Fortran programs often need the ability to alter details of a file connection, such as device residency, an alternative file name, a file space allocation scheme or structure, or data conversion properties. These file connection details taken together comprise the assign environment, and they can be modified by using the assign command and assign library interface.

The assign environment can also be accessed from C/C++ by using the ffassign library interface. For more information, see the assign(1), assign(3f), and ffassign(3c) man pages.