我有这段代码，但是出现了错误。
我尝试将status声明为
INTEGER :: status
但是这会改变MPI_SENDRECV之后我的进程等级的值（即所有处理器的rank=0）。
PROGRAM testsendrecv
IMPLICIT NONE
INTEGER :: i, k, nx, nz
INTEGER :: ierror, comm, p, rank, npr, prev
INTEGER :: status(MPI_STATUS_SIZE)
REAL(KIND = 8), ALLOCATABLE :: A(:,:), B(:), C(:)
include 'mpif.h'
nx = 5
nz = 5
ALLOCATE(A(nx,nz), B(nx))
CALL MPI_INIT(ierror)
comm = MPI_COMM_WORLD
!Get rank
CALL MPI_COMM_RANK(comm, rank, ierror)
!Get number of processors
CALL MPI_COMM_SIZE(comm, p, ierror)
A(:,:) = rank
IF(rank==0) THEN
prev = p-1
ELSE
prev = rank-1
END IF
CALL MPI_SENDRECV(A(:,1), nx, MPI_DOUBLE_PRECISION, MOD(rank+1,p), 1, &
B(:), nx, MPI_DOUBLE_PRECISION, prev, 1, comm, status, ierror)
WRITE(*,*) rank
WRITE(*,*) B(1)
CALL MPI_FINALIZE(ierror)
END PROGRAM testsendrecv
上述代码给我返回了以下错误信息。
bash-4.1$ mpif90 testsendr.f90
mpif.h:79.35:
Included at testsendr.f90:9:
PARAMETER (MPI_STATUS_SIZE=5)
1
Error: VARIABLE attribute of 'mpi_status_size' conflicts with PARAMETER attribute at (1)
mpif.h:80.33:
Included at testsendr.f90:9:
INTEGER MPI_STATUS_IGNORE(MPI_STATUS_SIZE)
1
Error: Variable 'mpi_status_size' cannot appear in the expression at (1)
mpif.h:80.49:
Included at testsendr.f90:9:
INTEGER MPI_STATUS_IGNORE(MPI_STATUS_SIZE)
1
Error: The module or main program array 'mpi_status_ignore' at (1) must have constant shape
mpif.h:81.35:
Included at testsendr.f90:9:
INTEGER MPI_STATUSES_IGNORE(MPI_STATUS_SIZE,1)
1
Error: Variable 'mpi_status_size' cannot appear in the expression at (1)
mpif.h:81.53:
Included at testsendr.f90:9:
INTEGER MPI_STATUSES_IGNORE(MPI_STATUS_SIZE,1)
1
Error: The module or main program array 'mpi_statuses_ignore' at (1) must have constant shape
testsendr.f90:6.20:
INTEGER :: status(MPI_STATUS_SIZE)
1
Error: Variable 'mpi_status_size' cannot appear in the expression at (1)
testsendr.f90:6.36:
INTEGER :: status(MPI_STATUS_SIZE)
1
Error: The module or main program array 'status' at (1) must have constant shape
任何想法。这是一个非常简单的程序。
谢谢。