#include <stdio.h>
#include <float.h>
#include <math.h>
double d1mach_(int *i)
{
       switch(*i){
         case 1: return DBL_MIN;
         case 2: return DBL_MAX;
         case 3: return DBL_EPSILON/FLT_RADIX;
         case 4: return DBL_EPSILON;
         case 5: return log10((double)FLT_RADIX);
  	 default: return 0.0;
         }
 }