Storing Integers as Doubles - Printable Version

Storing Integers as Doubles - Printable Version

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Storing Integers as Doubles - WhatMeWorry - Jun 29, 2011 09:56 AM

For simplicity sake, I want to store both floats and integers in the same structure element. I was wondering if I could just store everything as double. In other words, convert integers to doubles
before a save and convert the double to an integer after retrieval?

There won't be any precision lost?

Thanks.

RE: Storing Integers as Doubles - skyhawk - Jun 29, 2011 09:57 AM

Code:

union

{

  long bob;

  double ned;

}

RE: Storing Integers as Doubles - ThemsAllTook - Jun 29, 2011 10:33 AM

doubles have 52 bits of mantissa precision, so they can losslessly represent any integer between -4503599627370496 and 4503599627370496. 4503599627370497 is unrepresentable.