Java 大整數運算__Java

Java 大數運算 java大整數的一些運用：

import java.util.*;

import java.math.*;

public class Main{

    public static void main(String args[]){

       Scanner cin = new Scanner(System.in);

       BigInteger a, b;

      

       //以檔案EOF結束

       while (cin.hasNext()){

           a = cin.nextBigInteger();

           b = cin.nextBigInteger();

          

           System.out.println(a.add(b)); //大整數加法

           System.out.println(a.subtract(b)); //大整數減法

           System.out.println(a.multiply(b)); //大整數乘法

           System.out.println(a.divide(b)); //大整數除法(取整)

           System.out.println(a.remainder(b)); //大整數模數

          

           //大整數的比較

           if( a.compareTo(b) == 0 ) System.out.println("a == b"); //大整數a==b

           else if( a.compareTo(b) > 0 ) System.out.println("a > b"); //大整數a>b

           else if( a.compareTo(b) < 0 ) System.out.println("a < b"); //大整數a<b

          

           //大整數絕對值

           System.out.println(a.abs()); //大整數a的絕對值

          

           //大整數的冪

           int exponent=10;

           System.out.println(a.pow(exponent)); //大整數a的exponent次冪

          

           //返回大整數十進位的字串表示

           System.out.println(a.toString());

          

           //返回大整數p進位的字串表示

           int p=8;

           System.out.println(a.toString(p));

       }

    }

}