class Circle
{
private static double pi=3.14;
private double radius;
public Circle(double r)
{
radius=r;
}
public static double compare(Circle[] cir)
{
int max = 0;
for(int x=1; x<cir.length; x++)
{
if(cir[x].radius>cir[max].radius)//这里为什么要加上.radius啊?求详解
max = x;
}