#include <stdio.h>

extern char *eng(double,int,int);

int main(void)
{
      double w;
      for (w = 1e-27; w < 1e30; w *= 42) {
            printf("%g \t= %s", w, eng(w, 4, 1));
            printf(" \t= %s\n",    eng(w, 4, 0)); }
      return 0;
}