C++ 学习笔记 2020/02 25 21:02 一、override子类可以显式声明要复写此函数,如果父函数不存在/或者不匹配,则编译失败二、nullptr,NULLvoid foo(int) { … } // 1void foo(char*) { … } //2foo(NULL); 则2无法被调用; CopyRights: The Post by BY-NC-SA For Authorization,Original If Not Noted,Reprint Please Indicate From 老刘@开发笔记Post Link: C++ 学习笔记