我一直在编写代码以将书籍添加到library.When中,我将图书添加到库中,并尝试在库中显示任何内容。 int maxbooks=100; vector minilibrary(maxbooks); when I erase the "(maxbooks)" however the code works fine. But I don't understand why?#include <vector>
#include <
我有两个包:控制器和联邦。控制器只包含带有main方法的控制器类,但是联邦包含两个类: Shuttle (父类)和MiniShuttle (子类)。升空就像一种魅力,但是当我试图降级的时候,我得到了ClassCastException。Shuttle.javaMiniShuttle.java
public class MiniShuttle extends Shuttle