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C
C Demonstrates use of the single precision generator
C One stream is maintained per processor. Each processor prints a few
C single precision random numbers.
C
C Uncomment the following line to get the interface with pointer checking
C #define CHECK_POINTERS
program fsprngf_mpi
implicit none
#define FLOAT_GEN 1 ! make 'sprng()' return single precision numbers
#include <mpif.h>
#include "sprng_f.h"
integer streamnum, nstreams, seed
SPRNG_POINTER stream
real*4 rn
integer i, myid, nprocs, ierror, junk
C---
integer gtype
C---
call MPI_INIT(ierror)
call MPI_COMM_SIZE(MPI_COMM_WORLD, nprocs, ierror)
call MPI_COMM_RANK(MPI_COMM_WORLD, myid, ierror)
streamnum = myid
nstreams = nprocs
seed = 985456376
C--- node 0 is reading in a generator type
if (myid .eq. 0) then
#include "genf_types_menu.h"
print *,'Type in a generator type (integers: 0,1,2,3,4,5): '
read *, gtype
endif
call MPI_BCAST(gtype,1, MPI_INTEGER,0,MPI_COMM_WORLD,ierror)
C---
C
stream = init_sprng(gtype,streamnum,nstreams,seed,SPRNG_DEFAULT)
write(*, "('Process',i2,': Print information about stream:')"
& ) myid
junk = print_sprng(stream)
do 100 i = 1, 3
rn = sprng(stream)
write(*, "('Process',i2,', random number',i2,': ',f8.6)")
& myid,i,rn
100 continue
junk = free_sprng(stream)
call MPI_FINALIZE(ierror)
end
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