biginteger

问题 This question already has answers here : What is the standard solution in JavaScript for handling big numbers (BigNum)? [closed] (2 answers) Closed 5 years ago . I\'m looking for a Mathematical solution that deals with really (long, big, huge, storms) numbers. I haven\'t found anything yet, But I don\'t wanna think that this problem hasn\'t be solve at this time. I\'m looking for an easy Number solution, like Microsoft Excel Precision (30 decimals), or a BigInteger (Java) solution. in

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

问题 How would I go about doing calculations with extremely large numbers in Java? I have tried long but that maxes out at 9223372036854775807, and when using an integer it does not save enough digits and therefore is not accurate enough for what I need. Is there anyway around this? 回答1: You can use the BigInteger class for integers and BigDecimal for numbers with decimal digits. Both classes are defined in java.math package. Example: BigInteger reallyBig = new BigInteger("1234567890123456890");