纯虚函数使你不能定义对象。

https://help.ubuntu.com/6.10/ubuntu/packagingguide/C/basic-scratch.html http://topic.csdn.net/t/20040907/14/3348197.html http://zhidao.baidu.com/question/185750284.html?push=ql
原文地址:https://www.cnblogs.com/zhangze/p/1918914.html