frederic.bron@alcan.com wrote:
This is about output of real values (float, double, ...) in exponential format and output of not a number and infinity. My concern is that in C++, the output differs from one compiler/machine to another. It would be very nice if boost::format could garantee the same output on every computer.
I'm not 100% sure this will solve your problem, but you should have a look at the floating_point_utils from Johan Rade with help from John Maddock and others. You can find it in the vault here http://boost-consulting.com/vault/index.php?&direction=0&order=&directory=Math%20-%20Numerics It's not an official lib yet, but I believe it's been testing on a whole bunch of compilers and platforms. There's a long discussion of this in the mail archive -- look for 'fpclassify' on this page: http://lists.boost.org/Archives/boost/2006/12/index.php HTH, Jeff