Thread: random num MPI help

Hello, I would welcome some help to this problem. I am trying to have a random no generator in a way that will create random no different for each process in the MPI run. I tried to seed with something that will take the rank of the process as below so I can take different numbers but are the same every time I run the program.

HOW CAN I TAKE DIFFERENT?

Many thanks on behalf

Code:

#include <stdio.h>
#include <mpi.h>
#include <time.h>
#include <limits.h>
#include <stdlib.h>


int main(int argc, char *argv[])
{int i,id,p;

  double random_val;
  int seed;
  MPI_Init(&argc,&argv);
  MPI_Comm_rank(MPI_COMM_WORLD,&id);
  MPI_Comm_size(MPI_COMM_WORLD,&p);
   

seed = 123456789 + id*100;
srand(seed);

    random_val = (double)rand()/(double)RAND_MAX;
  printf("Hello, world from process number %d with rand no %f\n", id, random_val);
    
    
 
MPI_Finalize();
return 0;
}

ok I found the answer. You have to comble time and id seed.

jimtuv get a life