package trafic;

public class Initial {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Tracfic t1=new Air();

t1.a1=2;

t1.a2=3;

System.out.println("周长是："+t1.zhouchang());

System.out.println("面积是："+t1.square());

}

}