BasicCalculator class

gistfile1.txt

package edu.univdhaka.iit.calculator;

import java.math.BigInteger;
public class BasicCalculator {
	
	public BigInteger add(BigInteger a,BigInteger b)
	{
		return a.add(b);
	}
	
	public BigInteger subtract(BigInteger a,BigInteger b)
	{
		if (b.compareTo(a)==-1) return a.subtract(b);
		else if (a.compareTo(b)==-1) return b.subtract(a);
		else return a.subtract(b) ;
	}
	
	public BigInteger multiply(BigInteger a,BigInteger b)
	{
		return a.multiply(b);
	}
	
	public BigInteger divide(BigInteger a,BigInteger b)
	{
		//BigInteger result = new BigInteger(a.doubleValue());
					
		return a.divide(b);
	}
	
	
	public BigInteger exponent(BigInteger a,int b)
	{
		
		return a.pow(b);
	}
	
	public double squareroot(double a)
	{
	return Math.sqrt(a);
	}
	
	public int percentage(int a,int b)
	{
		
		return a*b/100;	
	}
	
	

}