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Test Your Knowledge in Computers #552
Difficulty: Medium
If variable i has the value 10, after x = 5 + (++i); the value of x after this code is 15.
True or False?
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mpi_file_c2f(3) [redhat man page]

MPI_File_c2f(3) 						       MPI-2							   MPI_File_c2f(3)

NAME
MPI_File_c2f - Translates a C file handle to a Fortran file handle SYNOPSIS
#include "mpi.h" MPI_Fint MPI_File_c2f(MPI_File fh) INPUT PARAMETERS
fh - C file handle (handle) RETURN VALUE
Fortran file handle (integer) 11/3/1998 MPI_File_c2f(3)

Check Out this Related Man Page

MPI_Comm_f2c(3OpenMPI)													    MPI_Comm_f2c(3OpenMPI)

NAME
MPI_Comm_f2c, MPI_Comm_c2f, MPI_File_f2c, MPI_File_c2f, MPI_Info_f2c, MPI_Info_c2f, MPI_Op_f2c, MPI_Op_c2f, MPI_Request_f2c, MPI_Request_c2f, MPI_Type_f2c, MPI_Type_c2f, MPI_Win_f2c, MPI_Win_c2f - Translates a C handle into a Fortran handle, or vice versa. SYNTAX
C Syntax #include <mpi.h> MPI_Comm MPI_Comm_f2c(MPI_Fint comm) MPI_Fint MPI_Comm_c2f(MPI_Comm comm) MPI_File MPI_File_f2c(MPI_Fint file) MPI_Fint MPI_File_c2f(MPI_File file) MPI_Group MPI_Group_f2c(MPI Fint group) MPI_Fint MPI_Group_c2f(MPI Group group) MPI_Info MPI_Info_f2c(MPI_Fint info) MPI_Fint MPI_Info_c2f(MPI_Info info) MPI_Op MPI_Op_f2c(MPI_Fint op) MPI_Fint MPI_Op_c2f(MPI_Op op) MPI_Request MPI_Request_f2c(MPI_Fint request) MPI_Fint MPI_Request_c2f(MPI_Request request) MPI_Datatype MPI_Type_f2c(MPI_Fint datatype) MPI_Fint MPI_Type_c2f(MPI_Datatype datatype) MPI_Win MPI_Win_f2c(MPI_Fint win) MPI_Fint MPI_Win_c2f(MPI_Win win) DESCRIPTION
Handles are passed between Fortran and C or C++ by using an explicit C wrapper to convert Fortran handles to C handles. There is no direct access to C or C++ handles in Fortran. Handles are passed between C and C++ using overloaded C++ operators called from C++ code. There is no direct access to C++ objects from C. The type definition MPI_Fint is provided in C/C++ for an integer of the size that matches a Fortran INTEGER; usually, MPI_Fint will be equivalent to int. The handle translation functions are provided in C to convert from a Fortran handle (which is an integer) to a C handle, and vice versa. For example, if comm is a valid Fortran handle to a communicator, then MPI_Comm_f2c returns a valid C handle to that same communicator; if comm = MPI_COMM_NULL (Fortran value), then MPI_Comm_f2c returns a null C handle; if comm is an invalid Fortran handle, then MPI_Comm_f2c returns an invalid C handle. NOTE
This function does not return an error value. Consequently, the result of calling it before MPI_Init or after MPI_Finalize is undefined. Open MPI 1.2 September 2006 MPI_Comm_f2c(3OpenMPI)

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