#include <omp.h>
#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[]) 
{
int tid;
int pr=-1, fp=-1, sh=-1, df=-1;

printf("BEGIN: pr is %d, fp is %d, sh is %d, df is %d.\n",pr,fp,sh,df);

#pragma omp parallel shared(sh) private(pr,tid) firstprivate(fp)
  {
  tid = omp_get_thread_num();

  printf("Thread %d START : pr is %d, fp is %d, sh is %d, df is %d.\n",tid,pr,fp,sh,df);
  pr = tid * 4; fp = pr; sh = pr; df = pr;
  printf("Thread %d UPDATE: pr is %d, fp is %d, sh is %d, df is %d.\n",tid,pr,fp,sh,df);
  }  /* end of parallel section */

printf("END: pr is %d, fp is %d, sh is %d, df is %d.\n",pr,fp,sh,df);
}