---

Manual Reference Pages  - c_sizeof (3)

---

NAME

c_sizeof(3f) - [FORTRAN:INTRINSIC:ISO_C_BINDING] Size in bytes of an expression

SYNTAX

n = c_sizeof(x)

DESCRIPTION

c_sizeof(x) calculates the number of bytes of storage the expression X occupies.

ARGUMENTS

X	The argument shall be an interoperable data entity.

RETURN VALUE

The return value is of type integer and of the system-dependent kind c_size_t (from the [[iso_c_binding]] module). Its value is the number of bytes occupied by the argument. If the argument has the POINTER attribute, the number of bytes of the storage area pointed to is returned. If the argument is of a derived type with POINTER or ALLOCATABLE components, the return value does not account for the sizes of the data pointed to by these components.

EXAMPLE

Sample program:

   program demo_c_sizeof
   use iso_c_binding
   implicit none
   real(c_float) :: r, s(5)
      print *, (c_sizeof(s)/c_sizeof(r) == 5)
   end program demo_c_sizeof

The example will print .true. unless you are using a platform where default REAL variables are unusually padded.

STANDARD

[[Fortran 2008]]

CLASS

Intrinsic function

SEE ALSO

storage_size(3)

---

c_sizeof (3)

March 11, 2021

Generated by manServer 1.08 from 1853bcf8-261b-4687-8598-46b30305794a using man macros.