biginteger

How to add two numbers of any length in java? Say for example, in java long size is 64 bit. So the maximum range is -9223372036854775808 to 9223372036854775807. Am i right? So if we want to add a number which is greater than this like below, i got a error " Integer Number too large" long a = 9223372036854775807L; long b = 9223372036854775808L; In C, we can take those numbers as char array, by traversing through the address of each char and use some data structure, we can add two numbers of any size. How to do it java. Can we traverse through the address of each character in String. Thanks for

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. GMP . LGPL. Standard download from official website is designed for GCC. VC++ port is available from here . Michael Burr I have not used it, so I'm pointing you here blind: LibTomMath by Tom St Denis: http://libtom.org/ Public Domain license. Website mentions that the library builds out of the box with GCC 2.95 [and up] as well as Visual C++ v6.00 [with SP5]

I'm importing a large text file, 17 million digits long and I'm using this code: BufferedReader reader = new BufferedReader(new FileReader("test2.txt")); String line = reader.readLine(); System.out.println("Done"); BigInteger num = new BigInteger(line); System.out.println("Done Again"); It loads the file pretty much instantly and prints out 'Done' but it takes a long time (about an hour) for the String to be converted into a BigInteger , is there anything I can do to speed this up and quickly load the number? As an optimization, since BigInteger is Serializable , you could save it to a binary

Since I started using eclipse for project euler, I noticed that big numbers sometime become a seemingly random negative numbers. I suppose this has something to do with passing the boudry of the type. I'll be glad if you could explain to me how these negative numbers are generated and what is the logic behind it. Also, how can I avoid them (preferable not with BigInteger class). Danke!=) Goatcat This image shows what you're looking for. In your case it's obviously larger numbers, but the principle stays the same. Examples of limits in java are: int: −2,147,483,648 to 2,147,483,647. long: -9

I want to be able to convert big ints into their full string derivatives. For example. $bigint = 9999999999999999999; $bigint_string = (string) $bigint; var_dump($bigint_string); outputs string(7) "1.0e+19" but i need string(19) "9999999999999999999" Please don't tell me that I should just originally set the $bigint value as a string. That is not an option. I really am stuck and don't know if it is even possible? You actually should ensure that you type what you mean: $bigint = 9999999999999999999; Is not a PHP integer but float: float(1.0E+19) If you would have done $bigint = (int)

I am trying to write a Java program to calculate factorial of a large number. It seems BigInteger is not able to hold such a large number. The below is the (straightforward) code I wrote. public static BigInteger getFactorial(BigInteger num) { if (num.intValue() == 0) return BigInteger.valueOf(1); if (num.intValue() == 1) return BigInteger.valueOf(1); return num.multiply(getFactorial(num.subtract(BigInteger.valueOf(1)))); } The maximum number the above program handles in 5022, after that the program throws a StackOverflowError . Are there any other ways to handle it? The problem here looks

I am getting the error BIGINT UNSIGNED value is out of range in '(1301980250 - mydb . news_articles . date )' When I run the query SELECT *, ((1 / log(1301980250 - date)) * 175) as weight FROM news_articles ORDER BY weight; Removing the ORDER BY condition, removes the error too. How can I fix it? Update: The date field contains unix timestamp (ex: 1298944082). The error started appearing after I upgraded MySQL from 5.0.x to 5.5.x Any help please? I recently ran into this and found the most reasonable solution to simply cast any UNSIGNED ints as SIGNED. SELECT *, ((1 / log(1301980250 - cast