"Java"-biginteger large number class using "Super Java large number template summary"

1. Unit variables common large number of operations:

Import Java.util.scanner;import java.math.*;p ublic class main{public static void Main (String args[]) {Scanner cin= new Sca Nner (system.in);//Use Sacnner class to create Cin object BigInteger A, b;//create large Number object while (Cin.hasnext ()) {A=cin.nextbiginteger (); b= Cin.nextbiginteger (); System.out.println ("a+b=" +a.add (b)); System.out.println ("a-b=" +a.subtract (b)); System.out.println ("a*b=" +a.multiply (b)); System.out.println ("a/b=" +a.divide (b)); System.out.println ("a%b=" +a.remainder (b)); if (A.compareto (b) ==0)//Compare the size of two numbers System.out.println ("a==b"); else if ( A.compareto (b) >0) System.out.println ("A>b"); else System.out.println ("a<b"); System.out.println (A.abs ());//Take absolute value int e=10; System.out.println (A.pow (e));//Seeking A^esystem.out.println (a.tostring ()); The large number A to the string output int p=8; System.out.println (A.tostring (p)); Convert large number A to P-binary and output by string}}}

2.java large number Implementation recursive formula:f[i]=f[i-1]+f[i-2]*2

Import Java.util.*;import java.math.*; Import classes public class main{    static biginteger[] ans;//define global variables public    static void Main (string[] args) {        Scanner Reader=new Scanner (system.in);        Defines the scanner class object        ans = new biginteger[251];//defines the size of the ANS large number array        ans[0]=biginteger.valueof (1);//large number of initial value        ans[1]= Biginteger.valueof (1);        Ans[2]=biginteger.valueof (3);        for (int i=3; i<=250; i++)        {            Ans[i] = Ans[i-1].add (Ans[i-2].multiply (biginteger.valueof (2)));        }  The use of large number additions        int n;        while (Reader.hasnextint ()) {            n=reader.nextint ();            System.out.println (Ans[n]); Normal output        }}}    

"Java"-biginteger large number class using "Super Java large number template summary"