Inputting large numbers in c++?
What's the best way to handle large numeric inputs in c++ (eg 10^100)? For algorithms I usually switch over to ruby and I sometimes use strings. Any other good methods? ...
biginteger
C++ handling very large integers
Hey everyone, I am using the RSA Algorithm for encryption/decryption, and in order to decrypt the files you have to deal with some pretty big values. More specifically, things like P = C^d % n = 62^65 % 133 Now that is really the only calculations that ill be doing. I have tried using Matt McCutchen's BigInteger Library, but I am g...
Big integers in C#
Currently I am borrowing java.math.BigInteger from the J# libraries as described here. Having never used a library for working with large integers before, this seems slow, on the order of 10 times slower, even for ulong length numbers. Does anyone have any better (preferably free) libraries, or is this level of performance normal? ...
C or C++ BigInt library on Microsoft Windows
What arbitrary-precision integers (and or rationals) library are there for compilers running on Microsoft Windows, and which would you recommend? Please state license type / cost, supported compilers (i.e. GCC and or VC++) for the library. ...
Big number in C++
Hey! I am trying to place a big number in a C++ variable. The number is 600851475143 I tried unsigned long long int but got an error saying it the constant was too big. I then tried a bigInt library called BigInt -> http://mattmccutchen.net/bigint/ The problem is I can't compile the code as I get many errors regarding the lib. undefi...
Print really big numbers
Hey! I have this code #include <iostream> using namespace std; int main(int argc,char **argv) { unsigned long long num1 = 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999...
How do I convert big numbers to decimal?
0x34363932353433373538323038353135353439 ...
infinite loop in c++
I'm learning C++ and writing little programs as I go along. The following is one such program: // This program is intended to take any integer and convert to the // corresponding signed char. #include <iostream> int main() { signed char sch = 0; int n = 0; while(true){ std::cin >> n; sch = n; std::cout << n << " -->...
How to implement big int in C++
Hi, I'd like to implement a big int class in C++ as a programming exercise. A class that can handle numbers bigger then a long int. I know that there are several open source implementations out there already, but I'd like to write my own. I trying to get a feel for what the right approach is. I understand that the general strategy i...
Is bigint large enough for an event log table?
Now I know that bigint is 2^64; that is, more atoms than there are in the known universe. I shouldn't be worried, as my mere human brain simply can't get around the enormity of that number. However, let's say that I record every change to every category, product and order in my system, from launch until the end of time. Should I be co...
working with incredibly large numbers in .NET
I'm trying to work through the problems on projecteuler.net but I keep running into a couple of problems. The first is a question of storing large quanities of elements in a List<t>. I keep getting OutOfMemoryException's when storing large quantities in the list. Now I admit I might not be doing these things in the best way but, is the...
How can I define a BigInt primary key with Rails 2.1 and MySQL?
Since Rails 2.1, if you define a new column in a migration with the type set to :integer and the :limit set to 5 or more, the column actually created in your MySQL database will be of type BigInt. That's perfect. But I cannot figure out how to create a table with a BigInt primary key. Any clues? ...
How can I add very large numbers in C++?
How can I add very large numbers in C++? ...
Which libraries for handling very large integers in languages without native support?
Various questions (like this, and this) ask about how to handle integer values exceeding the native types of a particular language. Please reply here, with one response per language, recommendations for libraries designed for handling very large numbers in various languages. Where languages have built-in support for large numbers that'...
Nested LINQ query using Contains with a bigint
This is the SQL I want (ClearinghouseKey is a bigint): select * from ConsOutput O where O.ClearinghouseKey IN ( select distinct P.clearinghouseKey from Project P Inner join LandUseInProject L on L.ClearinghouseKey = P.ClearinghouseKey where P.ProjectLocationKey IN ('L101', 'L102', 'L103') and L.LandUseKey IN ('U000', 'U001', '...
XML-RPC: best options for 64 bit ints?
XML-RPC unfortunately doesn't support 64-bit ints in the official standard. It seems there are several extensions that add this support. Do any of them seem to be more popular or better supported? Which extension do you use? Answers for all languages appreciated. ...
What should I use for a BigInt class in .NET?
Until BCL finally ships System.Numeric.BigInt, what do you guys use for arbitrary precision integers? ...
Square Root for Bigint in F#
Is there a way to get the square root of a big integer? I am dealing with numbers that are much too large for int64 to handle so bigint is a must. I was considering the idea of implementing it myself using the Babylonian method, but want to know if there are any built in functions for this first. Thanks in advance. ...
What is the best way to represent arbitrarily big numbers in c?
I'm working on a project that requires me to work with numbers larger than the largest numerical datatype in c. I was thinking of using structs with bit fields to represent this, but it's already smelling bad. Anyone got any tips? (Not looking for a library, more of a thought process to go behind doing something like this.) ...
beyond dot net large int
Duplicate: Working with incredibly large numbers in .net Does anyone know of a dot net class that will store LARGE integer values? and by LARGE values, I mean values that exceed the maximum size of the basic data types. I would hope that there would be a microsoft supplied class, but failing that I would be open to a 3rd party library...