ISO_C_BINDING

The intrinsic module provides a set of named constants and procedures that can assist you in programming with mixed languages.

Using Intrinsic Module Example
USE, INTRINSIC::ISO_C_BINDING

There are two groups of named constants included in this intrinsic module -- those that hold kind type parameter values for intrinsic types and those that provide a Fortran equivalent to some of the C special characters, including:

Named constant	C definition	Value
C_NULL_CHAR	null character	'\0'
C_ALERT	alert	'\a'
C_BACKSPACE	backspace	'\b'
C_FORMFEED	form feed	'\f'
C_NEW_LINE	new line	'\n'
C_CARRIAGE_RETURN	carriage return	'\r'
C_HORIZONTAL_TAB	horizontal tab	'\t'
C_VERTICAL_TAB	vertical tab	'\v'

The procedures included in ISO_C_BINDING are all generic, not specific. They include:

C_ASSOCIATED
C_F_POINTER
C_F_PROCPOINTER
C_FUNLOC
C_LOC
C_SIZEOF

Additionally, ISO_C_BINDING includes the following derived types to interoperate with C pointers:

C_PTR
C_FUNPTR
C_NULL_PTR
C_NULL_FUNPTR