How to do large scalar math

Question:
How can one do 64-bit or larger math calculations in C++? Do you know of a free class or class library that supports large scalar math?

Answer:
There are classes included in the GNU G++ distribution for handling very largenumbers. They have an Integer class and a class for Rational numbers, among other things. If you are not using the GNU G++ compiler, these libraries shouldstill port to other compilers with some effort..

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