As requested by Beman, I have purged all my math constants proposals, except the latest version, from the files section. I have also updated the copyright notices on the macro (36 decimal digit) constants values, and posted these zipped. Until we can agree a better method of presenting math constants, these may save users surfing the net for individual values. (Since some people seem to find the files section inaccessible, should they be copied to the CVS sandbox too?) Since the two files (to #define and #undef) are quite short, they are also attached for your convenience. Please tell me of any mistakes you find. Paul PS If anyone has any suggestions on solving the presentation problem please say so. Daniel Frey seems close to a portable solution, but "a miss is a good as a mile" :-( Type deduction seems the nub of the problem: can anything from FC++ help? Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB +44 1539 561830 +44 7714 330204 mailto: pbristow@hetp.u-net.com