largenumber

问题 What is the best way to handle large numeric inputs in C++ (for example 10^100 )? For algorithms I usually switch over to ruby and I sometimes use strings. Any other good methods? 回答1: It sounds like you're looking for a way to enter Arbitrary Precision numbers. here are two libraries you could use: GMP and MAPM 回答2: Check out The Large Integer Case Study in C++.pdf by Owen Astrachan. I found this file extremely useful with detail introduction and code implementation. It doesn't use any 3rd

问题 I\'ve been considering fast poker hand evaluation in Python. It occurred to me that one way to speed the process up would be to represent all the card faces and suits as prime numbers and multiply them together to represent the hands. To whit: class PokerCard: faces = \'23456789TJQKA\' suits = \'cdhs\' facePrimes = [11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 53, 59, 61] suitPrimes = [2, 3, 5, 7] AND def HashVal(self): return PokerCard.facePrimes[self.cardFace] * PokerCard.suitPrimes[self

问题 I\'d like to implement a big int class in C++ as a programming exercise—a class that can handle numbers bigger than a long int. I know that there are several open source implementations out there already, but I\'d like to write my own. I\'m trying to get a feel for what the right approach is. I understand that the general strategy is get the number as a string, and then break it up into smaller numbers (single digits for example), and place them in an array. At this point it should be