JAVA large Number Class

Encounter a lot of large number of topics, heard Java comparison Rogue, hurriedly to learn Ipo (<?????) >)

Add large numbers:

1 //Add a large number of JAVA2 import Java.math.BigInteger;3Import java.util.*;4Import java.io.*;5 6  Public classMain7 {8      Public Static voidMain (String args[])9     {TenScanner cin =NewScanner (System.inch); OneBigInteger A =Cin.nextbiginteger (); ABigInteger B =Cin.nextbiginteger (); -BigInteger ans =A.add (b); -System. out. println (ans); the     } -}

Multiply by large number:

1 //Multiply JAVA Large numbers2 import Java.math.BigInteger;3Import java.util.*;4Import java.io.*;5 6  Public classMain7 {8      Public Static voidMain (String args[])9     {TenScanner cin =NewScanner (System.inch); OneBigInteger A =Cin.nextbiginteger (); ABigInteger B =Cin.nextbiginteger (); -BigInteger ans =a.multiply (b); -System. out. println (ans); the     } -}

Subtraction of large numbers: public BigInteger subtract (BigInteger val)

Divide large number: public BigInteger divide (BigInteger val)

Large number factorial:

1 //JAVA large number factorial2Import java.io.*;3 import Java.math.BigInteger;4Import java.util.*;5 6  Public classMain7 {8      Public Static voidMain (String args[])9     {TenScanner cin =NewScanner (System.inch);  One         intn = cin.nextint ();//Enter int type ABigInteger ans =Biginteger.one; -          for(inti =1; I <= N; i++) -Ans =ans.multiply (biginteger.valueof (i)); theSystem. out. println (ans); -     } -}

Large number comparison size

1 //JAVA Large number comparison size2Import java.io.*;3 import Java.math.BigInteger;4Import java.util.*;5 6  Public classMain7 {8      Public Static voidMain (String args[])9     {TenScanner cin =NewScanner (System.inch);  One          while(Cin.hasnext ()) A         { -BigInteger A =Cin.nextbiginteger (); -BigInteger B =Cin.nextbiginteger (); the             if(A.equals (Biginteger.zero) && b.equals (Biginteger.zero)) Break; -             intFlag =A.compareto (b); -             if(Flag = =-1) -System. out. println ("a<b"); +             Else if(Flag = =0) -System. out. println ("a==b"); +             Else ASystem. out. println ("a>b"); at         } -     } -}

High precision Power

1 //JAVA High-precision power2Import java.io.*;3 import Java.math.BigDecimal;4Import java.util.*;5 6  Public classMain7 {8      Public Static voidMain (String args[])9     {TenScanner cin =NewScanner (System.inch);  One          while(Cin.hasnext ()) A         { -BigDecimal ans =cin.nextbigdecimal (); -             intn =cin.nextint (); theString res = ANS.POW (n). Striptrailingzeros (). toplainstring ();//integer minus the 0 and decimal points in the back -             if(Res.startswith ("0"))//Remove leading 0 -             { -res = res.substring (1); +             } -System. out. println (res); +         } A     } at}

The BigDecimal here is equivalent to double, but with a higher precision

JAVA large Number Class