Circle
2017-11-30 15:25 沈橙Anei 阅读(140) 评论(0) 编辑 收藏 举报class Circle
{
final float PI=3.14f;
private float radius;
public void setRadius(float radius)
{this.radius=radius;}
public float getRadius()
{return radius;}
public float getArea()
{return PI*radius*radius;}
}
