this指针 http://c.biancheng.net/view/170.html 重载操作符介绍 https://blog.csdn.net/liitdar/article/details/80654324 template https://www.cnblogs.com/yangxiaoping/p/8268209.html
C++问题汇总
原文：https://www.cnblogs.com/sakura745/p/11984859.html
