So use a signed double. If you need more than one terrabyte or whatever it's called of anything, then you have MUCH more important things to worry about =] Like whether you really should be designing a program for NASA on a home PC or not ;]
Remind me to quote you on that in 10 years time just to embarrass you ;-)
Remind me to quote you on that in 10 years time just to embarrass you ;-)