有没有办法将矢量推回矢量？C++

Question

例如,如果我有一个或多个2D向量,我只想将它们存储在数据库中.

 vector<vector<double>> one2DVector;
 vector<vector<double>> two2DVector;

 //Obviously can't do that but this is what I want to do
 vector<vector> dataBase;

 dataBase.push_back(one2DVector);
 dataBase.push_back(one2DVector);

Answer 1

你需要这样声明:

vector<vector<vector<double>>> dataBase;

请注意,如果使用C++ 98而不是C++ 11,则需要在>括号之间放置空格.