求各位大神帮忙修改一下，编译没错，但是结果一直不对？

Question

5、创建一个名称为CCCircle的类来表示平面坐标系上的圆形，要求圆心点用CCCircle的内部类Point表示，CCCircle类中包含求一点到圆心距离的方法public double distance(Piont p)。在main方法中实例化一个圆c（（10，10），2），一个点p（5，5），再求p与c之间的关系。
public class CCCircle{
public double x;
public double y;
public static double r;
public CCCircle() {
x=0;
y=0;
r=0;
}
public CCCircle(double x,double y,double r) {
this.x=x;
this.y=y;
this.r=r;
}
public class Point{
public double x;
public double y;

    public Point(double x,double y){
        this.x=x;
        this.y=y;
    }
}
public double distance(Point p) {
    return Math.sqrt((this.x-x)*(this.x-x)+(this.y-y)*(this.y-y));
}

public static void main(String[] args) {
    CCCircle c=new CCCircle(10,10,2);
    CCCircle.Point p=c.new Point(5,5);

    if(c.distance(p)>r) {
        System.out.println("点在圆外");
    } else if(c.distance(p)==r) {
        System.out.println("点在圆上");
    } else {
        System.out.println("点在圆内");}

Answer 1

 public class Program {

    class CCCircle{
        public double x;
        public double y;
        public double r;
        public CCCircle() {
            x=0;
            y=0;
            r=0;
        }
        public CCCircle(double x,double y,double r) {
            this.x=x;
            this.y=y;
            this.r=r;
        }

        public double distance(Point p) {
            return Math.sqrt((x-p.x)*(x-p.x)+(y-p.y)*(y-p.y));
        }

        class Point{
            public double x;
            public double y;

            public Point(double x,double y){
                this.x=x;
                this.y=y;
            }
        }
    }

    public static void main(String[] args) {
        Program prog = new Program();
        Program.CCCircle c = prog.new CCCircle(10,10,5);
        Program.CCCircle.Point p = c.new Point(7,7);
        double epsilon = 0.0001;
        if(c.distance(p)-c.r > epsilon) {
            System.out.println("点在圆外");
        } else if(c.distance(p)-c.r <= epsilon && c.distance(p) - c.r >= -epsilon) { //这里特别注意，浮点数不能直接比较
            System.out.println("点在圆上");
        } else {
            System.out.println("点在圆内");
        }
    }
}