#include <stdio.h>
#include <math.h>

#define NomFichier "fil01"
#define P1 buffer[0]
#define P2 buffer[5]
#define P3 buffer[4]
#define P4 buffer[3]
#define P5 buffer[2]
#define P6 buffer[1]

void main(argc,argv)
int argc;
char **argv;
{
   FILE *fin;
   unsigned char buffer[6];
   double x,y;

   fin=fopen(NomFichier,"rb");
   while (!feof(fin)) {
      fread(buffer,6,1,fin);
      printf("%x %x %x %x %x %x  ==>",buffer[0],buffer[1],buffer[2],
                                   buffer[3],buffer[4],buffer[5]);

      x=((((P6/256.0+P5)/256.0+P4)/256.0+P3)/256.0+(P2 & 0x7f))/128.0+1.0;
      y=(P1<0x81)?-1.0*(0x81-P1):P1-0x81;
      x=x*pow(2.0,y);
      if (P2>=128) x=-1*x;
      printf("%g\n",x);
   };
   fclose(fin);
};