myBigInteger

Class AddSubInt

java.lang.Object

myBigInteger.AdditionOnlyInt

myBigInteger.AddSubInt

All Implemented Interfaces:

java.lang.Comparable<BigInt>, BigInt

Direct Known Subclasses:

SignedAddSubInt, UnsignedBigInt

public class AddSubInt
extends AdditionOnlyInt

This BigIng extends AdditionOnlyInt with subtraction supported.

Author:

Chung-Chih Li

Constructor Summary

Constructors

Constructor and Description
AddSubInt()
AddSubInt(AddSubInt a) Copy constructor; a deep copy should be performed.
AddSubInt(java.lang.String a) This is a constructor that construct an AddSubInt with value presented by the input string.

Method Summary

Modifier and Type	Method and Description
static AddSubInt	add(AddSubInt a, AddSubInt b) The method should not have side-effect.
static AddSubInt	subtract(AddSubInt a, AddSubInt s)
void	subtract(BigInt us) Students don't have to implement this method for Asg3.

Methods inherited from class myBigInteger.AdditionOnlyInt

add, add, compareTo, div, equals, times, toString

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AddSubInt

public AddSubInt()

AddSubInt

public AddSubInt(java.lang.String a)

This is a constructor that construct an AddSubInt with value presented by the input string. For example, if input a = "000123400", this constructor will set the byte array to have value {0,0,4,3,2,1}. Note that the leading zeros in the input string should not be stored.

Parameters:

a - is a string such as "000123400"

AddSubInt

public AddSubInt(AddSubInt a)

Copy constructor; a deep copy should be performed.

Parameters:

a - to be copied

Method Detail

add

public static AddSubInt add(AddSubInt a,
                            AddSubInt b)

The method should not have side-effect. I.e., the contents of this, a and b should not be modified.

Parameters:

a - is AddSubInt

b - is AddSubInt

Returns:

the result of a+b in an AddSubInt

subtract

public static AddSubInt subtract(AddSubInt a,
                                 AddSubInt s)

subtract

public void subtract(BigInt us)

Description copied from class: AdditionOnlyInt

Students don't have to implement this method for Asg3. Just make an empty function body.

Specified by:

subtract in interface BigInt

Overrides:

subtract in class AdditionOnlyInt

Parameters:

us - to be substracted