#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """From mantissa, exponent pair to floating point value.
     """
     #end_pymotw_header
     
     import math
     
     print '{:^7}  {:^7}  {:^7}'.format('m', 'e', 'x')
     print '{:-^7}  {:-^7}  {:-^7}'.format('', '', '')
     
     for m, e in [ (0.8, -3),
                   (0.5,  0),
                   (0.5,  3),
                   ]:
         x = math.ldexp(m, e)
         print '{:7.2f}  {:7d}  {:7.2f}'.format(m, e, x)