biginteger

问题 We are facing some issue in which when we try to map BigInteger in Java with BigInt in sql, its value got changed. We also try to convert it to longValue before mapping but it also failing as long could not able to handle its value. We tried with toString() and it got worked but is their any other workaround apart from using toString() ? 回答1: Java's BigInteger does not correspond with SQL Server's bigint - despite the similar names they are almost completely different: In Java, BigInteger is

问题 In hackerrank website there is a task called Summing the N series Under Mathematics section. Here is link for the same https://www.hackerrank.com/challenges/summing-the-n-series/problem I have tried many things. Finally came to point where some of my test cases are passing some are not due to timeout exception. Here is the complete code. Please let me know what would be solution. public class Solution { static int mod = 1000000007; static int summingSeries(long t) { long sum = 0; for (int i =

问题 This question already has answers here : Why do these two multiplication operations give different results? (2 answers) Closed 5 years ago . why this math return negative numbers for some numbers: int x = 351; String bigValue= ((50*x*x*x-150*x*x+400*x)/3) + ""; BigInteger resultInteger = new BigInteger(bigValue); System.out.println(resultInteger); result -> 714612600 but if i use 352 result -> -710900565 for x=500 -> 639244234 WHY? 回答1: This line here: (50*x*x*x-150*x*x+400*x)/3 Is using

问题 This code works fine for some inputs. but I get a NumberFormatError for higher values of inputs such as 1000000. The input (taken for s[]) ranges from values 1-2000000 What could be the reason? import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */ try { BufferedReader

问题 I am trying to generate a random prime number of type BigInteger, that is between a min and max value which I supply. I am aware of the BigInteger.probablePrime(int bitlength, random), but I am not sure how or even if the bitlength translates into a max/min value of the outputted prime. Thanks, Steven1350 回答1: BigInteger.probablePrime(bitLength, random) is going to return a (probable) prime of the specified bit length. That translates into a maximum value of 2^bitlength - 1 and a minimum of 2

问题 I am working on a project right now where I need to perform calculations for numbers with base 256. I am reading bytes of a file and storing it in an array of uint8_t (a.k.a unsigned char or BYTE ). The largest supported number data type doesn't satisfy the needs of my project. So the array of bytes is acting like a custom length/size data type ( BigInt ). I now need to perform arithmetic on it like: -1, /2, %2 . For example this is how addition looks like to demonstrate how my numbers should

问题 I'm having some trouble getting my copy constructor to work in my BigInt class I'm working on. In BigIntVector.cpp in the copy constructor, the lines: for (int i = 0; i < vectorSize; i++) { vectorArray[i] = orig.vectorArray[i]; } causes the exception 0xC0000005: Access violation writing location 0x00000000. Any help figuring out why would be appreciated. Thank you. In BigInt.cpp : // copy constructor BigInt::BigInt(BigInt const& orig) : isPositive(orig.isPositive) , base(orig.base) , skip

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I want to divide two large integers, a = 23546654 b = 24979799 and to get the result in double. 回答1: Try double x = ((double) a) / ((double) b) which first converts your ints to doubles and then does the division

问题 I want to know if a string with integer data can be converted to a CryptoJS word array correctly? Example. Can I convert "175950736337895418" into a word array the same way I can create a word array out of 175950736337895418 (int value). I have some code that converts integer values to word array // Converts integer to byte array function getInt64Bytes( x ){ var bytes = []; for(var i = 7;i>=0;i--){ bytes[i] = x & 0xff; x = x>>8; } return bytes; } //converts the byte array to hex string

问题 I am trying to shift a 7 byte array to the right by 7 bits. To do this, I am using BigInteger's shiftright method. However, when shifting right for negative BigIntegers, padding with 1s are added or sometimes the leading bit is removed. Here is the following bit of code doing the shifting: byte[] vcwManD = decryptedVCW; BigInteger bigIntD = new BigInteger(vcwManD); // create big int array for shift BigInteger shiftIntD= bigIntD.shiftRight(7); // shift right 7 bits vcwManD = shiftIntD