static char help[] = "Demonstrates PetscMatlabEngineXXX()\n";

#include <petscsys.h>
#include <petscmatlab.h>

int main(int argc,char **argv)
{
  PetscErrorCode ierr;
  PetscMPIInt    rank;
  char           buffer[256],*output,user[256];
  PetscBool      userhappy = PETSC_FALSE;

  ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
  ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);

  ierr = PetscMatlabEngineGetOutput(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),&output);CHKERRQ(ierr);

  ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),"MPI_Comm_rank");CHKERRQ(ierr);
  ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]Processor rank is %s",rank,output);CHKERRQ(ierr);
  ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);CHKERRQ(ierr);
  ierr = PetscPrintf(PETSC_COMM_WORLD,">>");CHKERRQ(ierr);
  ierr = PetscSynchronizedFGets(PETSC_COMM_WORLD,stdin,256,user);CHKERRQ(ierr);
  ierr = PetscStrncmp(user,"exit",4,&userhappy);CHKERRQ(ierr);
  while (!userhappy) {
    ierr = PetscMatlabEngineEvaluate(PETSC_MATLAB_ENGINE_(PETSC_COMM_WORLD),user);CHKERRQ(ierr);
    ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d]The result is %s",rank,output);CHKERRQ(ierr);
    ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD,">>");CHKERRQ(ierr);
    ierr = PetscSynchronizedFGets(PETSC_COMM_WORLD,stdin,256,user);CHKERRQ(ierr);
    ierr = PetscStrncmp(user,"exit",4,&userhappy);CHKERRQ(ierr);
  }
  ierr = PetscFinalize();
  return ierr;
}