public class Complex
{
    public float r,i;
    
    public Complex()
    {
        r = 0;
        i = 0;
    }
    public Complex(float lr,float li)
    {
        r = lr;
        i = li;
    }
    public Complex(Complex o)
    {
        r = o.r;
        i = o.i;
    }
    public void setMag(float m)
    {
        double tm = Math.sqrt(r*r+i*i);
        if (tm!=0)
        {
            r*=(m/tm);
            i*=(m/tm);        
        }
    }
    public void rotPhase(float p)
    {
        double or = r*Math.cos(p) + i*Math.sin(p);
        i = (float)(-r*Math.sin(p) + i*Math.cos(p));
        r = (float)or;
    }
    public float getPhase()
    {
        return (float)Math.atan2(i,r);
    }       
    public float getMag()
    {
        return (float)Math.sqrt(i*i+r*r);
    }
}