/* amdahl.c  parallel speedup */
#include <stdio.h>
int main(int argc, char * argv[])
{
  double pcts[5] = {50.0, 75.0, 90.0, 95.0, 99.0};
  int n, p, i;
  double su;

  printf("amdahl.c percent parallel, number of processors, speed up \n");
  for(p=0; p<5; p++)
  {
   for(n=1; n<=4096; n*=2)
   {
     su = 100.0/(pcts[p]/(double)n + (100.0-pcts[p]));    
     printf("pct=%6.2f\%, n=%5d, speedup=%7.3f \n", pcts[p], n, su); 
   }
   printf("\n");
  }
  return 0;
} /* end amdahl.c */