class op
{
    public double a,b,c;
    public op(double x,double y)
    {
        a=x;
        b=y;
    }
    public op(double x)
    {
        c=x;
    }
    public void show(double a,double b)
    {
        System.out.println(Math.pow(a,b));
    }
    public void show(double c)
    {
        System.out.println(Math.sqrt(c));
    }
}
public class p4_14
{
    public static void main(String []args)
    {
        op z1=new op(2,3);
        op z2=new op(9);
        System.out.print("z1=");
        z1.show(2,3);
        System.out.print("z2=");
        z2.show(9);
    }
}