I'm looking for a good and basic BigInt class in C++, I find a lot of implementation but most of the time, it's complex implementation for crypto library...
By basic, I mean BigInt can deal with BigInt, long long and strings with operator overloading. If I had time, I had done myself but I do not have time to create an entire BigInt class.
The BIGINT data type is a machine-independent method for representing numbers in the range of -2 63-1 to 2 63-1. ESQL/C provides routines that facilitate the conversion from the BIGINT data type to other data types in the C language. The BIGINT data type is internally represented with the ifx_int8_t structure.
We can use big integer datatype. We can use different datatypes like int128_t, int256_t, int1024_t etc. By using this we can get precision up to 1024 easily. At first we are multiplying two huge number using boost library.
BigInteger is a . NET 2.0 and Mono library for handling very large integers, up to 10240 binary digits or approximately (safe to use) 3000 decimal digits.
The simplest library I know of is InfInt. It consists of just one header file. Its usage is fairly simple. Here is a sample code:
InfInt myint1 = "15432154865413186646848435184100510168404641560358";
InfInt myint2 = 156341300544608LL;
myint1 *= --myint2 - 3;
std::cout << myint1 << std::endl;
http://sourceforge.net/projects/cpp-bigint/
C++ class BigInt that enables the user to work with arbitrary precision integers.
Here's one. I haven't used it, but it doesn't look too complex, and it was the first result when I googled "bigint c++".
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