【面向对象】面向对象程序设计测试题9-对象之间的继承关系测试题

Test9：对象之间的继承关系测试题

问题 1 What will happen if you attempt to compile and run the following code?

class Base{
   }

class Sub extends Base{
   }

class Sub2 extends Base{
   }

public class CEx