public class Racine  {
    private double precision;
    
    public Racine(double precision) {
	this.precision = precision;
    }
    
    public double racine(double operande) {
	double solution, carre, a, b;
	
	a = 0;
	b = operande;
	solution  =(a+b)/2;
	while (b - a > precision) {
		carre = solution * solution;
	      if (carre > operande) b = solution;
	      else a = solution;
	      solution = ( a + b) / 2;
	    }
	return solution;
    }
    
    public double getPrecision() {
	return precision;
    }
    
    public void setPrecision(double precision) {
	this.precision = precision;
    }
}