package rebelsky.sqrt;

import java.math.BigDecimal;

public class MyMath1 {
	public static BigDecimal sqrt(BigDecimal n, BigDecimal a)
		throws Exception
	{
		BigDecimal d2= BigDecimal.valueOf(2.0);
		if ( n.divide(a)==a) {
			return a;
		} // if (the solution is close enough)
		else { 
			return sqrt(n, (a.add((n.divide(a, BigDecimal.ROUND_HALF_EVEN )))).divide(d2)) ;
		} // if the solution is not close enough
	}
}

/*
 * Potential problems
 *   * Should probably stop when "close enough" and not when equal
 *   * Didn't quite get the letter of the instructions right - Spirit
 *     was "compute square roots"; letter was "n, epsilon as params,
 *     call helper that also takes a"
 *   * Nesting might be confusing, but might be necessary.
 *   * Boy, that line is long.
 *   * Formatting: Braces are not used in the "standard" way.
 *   * Did not use recommended form of division.
 */