C++ handling very large integers

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Tomek, it sounds like you aren’t linking to the BigInteger code correctly. I think you should resolve this problem rather than looking for a new library. I took a look at the source, and BigInteger::BigInteger(int) is most definitely defined. A brief glance indicates that the others are as well.

The link errors you’re getting imply that you are either neglecting to compile the BigInteger source, or neglecting to include the resulting object files when you link. Please note that the BigInteger source uses the “cc” extension rather than “cpp”, so make sure you are compiling these files as well.

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