Constants
The header files are full of constants that are used as arguments to MPI
procedures.
Examples:
! MPI types for Fortran programs
!
integer MPI_INTEGER, MPI_REAL, MPI_DOUBLE_PRECISION
integer MPI_COMPLEX, MPI_DOUBLE_COMPLEX, MPI_LOGICAL
!
parameter (MPI_COMPLEX=23, MPI_DOUBLE_COMPLEX=24, MPI_LOGICAL=25)
parameter (MPI_REAL=26, MPI_DOUBLE_PRECISION=27, MPI_INTEGER=28)
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