cycle.java

初学java,最近帮同学作的一些实验

public class cycle extends father{
    public double r=0;
    public cycle(double cx,double cy,double r)
    {
    	this.Cx=cx;
    	this.Cy=cy;
    	this.r=r;
    }
    public double computC()
    {
    	c=2*r*Math.PI;
    	return c;
    }
    public double computS()
    {
    	s=Math.PI*r*r;
    	return s;
    }
    public void computCenter()
    {}
}