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/***************************************************************************/
/* ____Demonstrates use of the single precision generator____ */
/* One stream is maintained per processor. Each processor prints a few */
/* single precision random numbers. */
/***************************************************************************/
#include <stdio.h>
#include <mpi.h> /* MPI header file */
/* Uncomment the following line to get the interface with pointer checking */
/*#define CHECK_POINTERS */
#define FLOAT_GEN /* make 'sprng()' return single precision numbers*/
#include "sprng.h" /* SPRNG header file */
#define SEED 985456376
main(int argc, char *argv[])
{
int streamnum, nstreams, *stream;
float rn;
int i, myid, nprocs;
int gtype; /*--- */
/************************** MPI calls ************************************/
MPI_Init(&argc, &argv); /* Initialize MPI */
MPI_Comm_rank(MPI_COMM_WORLD, &myid); /* find process id */
MPI_Comm_size(MPI_COMM_WORLD, &nprocs); /* find number of processes */
/************************* Initialization ********************************/
streamnum = myid;
nstreams = nprocs; /* one stream per processor */
/*--- node 0 is reading in a generator type */
if(myid == 0)
{
#include "gen_types_menu.h"
printf("Type in a generator type (integers: 0,1,2,3,4,5): ");
scanf("%d", >ype);
}
MPI_Bcast(>ype,1,MPI_INT,0,MPI_COMM_WORLD ); /*--- broadcast gen type */
stream = init_sprng(gtype,streamnum,nstreams,SEED,SPRNG_DEFAULT); /*initialize stream*/
printf("Process %d: Print information about stream:\n",myid);
print_sprng(stream);
/*********************** print random numbers ****************************/
for (i=0;i<3;i++)
{
rn = sprng(stream); /* generate single precision random number */
printf("Process %d, random number %d: %f\n", myid, i+1, rn);
}
/*************************** free memory *********************************/
free_sprng(stream); /* free memory used to store stream state */
MPI_Finalize(); /* Terminate MPI */
}
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