您可以使用STL中的设置模板。

http://www.cplusplus.com/reference/set/set/ [ ^ ]

You may us the set template in STL.
http://www.cplusplus.com/reference/set/set/[^]

Modifiers:
insert
Insert element (public member function)
erase
Erase elements (public member function)

有一些示例代码：

http://www.cplusplus.com/reference/set/set/erase/ [ ^ ]

您可以从近乎删除一个随机元素所有容器类，但不是来自队列或堆栈。它可能是列表，矢量，地图等。我没有计算本机C / C ++数组，它不是容器类。你应该选择哪种容器类？这取决于您的其他要求。

-SA

You can remove a random element from nearly all container classes, but not from a queue or a stack. It could be list, vector, map, etc. I did not count native C/C++ array, which is not a container class. What container class should you choose? It depends on your other requirements.

—SA