package rebelsky.sqrt;

import java.io.PrintWriter;
import java.math.BigDecimal;
import java.math.MathContext;

public class MyMath3
{
        public static BigDecimal sqrt(BigDecimal n, BigDecimal epsilon)
        	throws Exception
        {
                BigDecimal a = BigDecimal.ONE;
                BigDecimal two = new BigDecimal("2");
                MathContext  prec = new MathContext(8);
                while (a.subtract(n.divide(a, prec)).abs().compareTo(epsilon) > 0) {
                        a = a.add(n.divide(a, prec)).divide(two);
                } // while
                return a;      
        } // sqrt
        
        public static BigDecimal sqrt(BigDecimal n, BigDecimal epsilon, PrintWriter pr)
        	throws Exception
        {
                BigDecimal a = BigDecimal.ONE;
                BigDecimal two = new BigDecimal("2");
                MathContext  prec = new MathContext(8);
                while (a.subtract(n.divide(a, prec)).abs().compareTo(epsilon) > 0) {
                        a = a.add(n.divide(a, prec)).divide(two);
                        pr.println("Approximation: " + a);
                } // while
                return a;      
        } // sqrt 
} // MyMath3