MPI Sorting and Prefix Sum

[Newby2012]

New to MPI and C, I have used the pseudo code for the sorting algorithms and this is what I have constructed. I know its not perfect but I'm searching for help on how to fix it.

#include <stdio.h>
#include <mpi.h>
void PrefixSum();
int id, rank, nprocs;
int size;
int main(int argc, char** argv)
{  
 MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
    MPI_Status status;
 
 size = rank/nprocs;
 
 if (id == 0)
 {
  for(i=0;i<nprocs;i++)
  MPI_Send(id, size, MPI_INT, i, 0, MPI_COMM_WORLD);
 }
 else
 {
  MPI_Recv(id, size, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
 }
  MPI_Barrier(MPI_COMM_WORLD);
   
  size = rank/nprocs;
        partner_id = id + size(log(2));
        MPI_Reduce(&result, &rank, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
        if (id == 0)
        MPI_Barrier(MPI_COMM_WORLD);
  
 return 0;
    MPI_Finalize();
 
}
void PrefixSum(int id, int number, partner_id, result)
{
 int d, partner_id, id, number, result;
 
 int size;
 result = number;
 message = result;
 
 for (i=0; i<=(size/log(2)); i++)
 {
  MPI_Recv(partner_id, 1, MPI_INT, predec, 0, MPI_COMM_WORLD, &status);
 
  if (partner_id == 0)
  {
   MPI_Send(partner_id, message, MPI_INT, i, 0, MPI_COMM_WORLD);
  
   else (partner_id == 1)
   {
    MPI_Recv(number, partner_id, MPI_INT, 0, 0, MPI_COMM_WORLD, &status);
   }
  }
 
  message += number;
  
  if(partner_id < id)
  {
   result += number;
   MPI_Send(partner_id, result, MPI_INT, i, 0, MPI_COMM_WORLD);
  }
 }
}

[AndiPersti]

New to MPI and C

How about learning the basics of C before trying to learn MPI?

Even without knowing anything about MPI, I've noticed several syntax errors. Take a look at a C Tutorial (e.g. the one on this site) and come back with specific questions.

Include all the errors/warnings you get when compiling the code in your posts too.

Bye, Andreas