c++ - 使用vector没有头文件为啥不报错？

Question

include &lt;opencv2/opencv.hpp&gt; include &lt;iostream&gt; include &lt;cassert&gt; include &lt;cmath&gt; include &lt;fstream&gt; using namespace std;using name

伊谢尔伦 · Answer

因为OpenCV有cv::vector…

巴扎黑 · Answer

并没有存在。。

ringa_lee · Answer

opencv里是应该有类似这样的代码

include

namespace cv {
using std::vector;
}

高洛峰 · Answer

你用的是cv::vector，而不是std::vector

include <opencv2/opencv.hpp>

include <iostream>

include <cassert>

include <cmath>

include <fstream>

include <vector>