Wow thanks for all the replies ;) You have all been very patient. This is my first post here.

I have made some progress using "bigint" and have the code actually getting exact on digits of up to 19 characters. I found that the calculations are identical until the number reaches 19 digits. The c++ is using 64bit signed ints that it says "wrap around" on overflow with arithmitic operations. So at the end of a calculation you can have a -6213077893701800743 number. Perl's would still be a +positive number therefore they do not match.

Perl seems to keep adding straight on up so I have to reconcile that somehow after 19 digits. Sheesh how did I get here? Fun fun fun ;)

In reply to Re^2: The 16 digit number dilemma. by docster
in thread The 16 digit number dilemma. by docster

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