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

Because OpenCV has cv::vector…

巴扎黑 · Answer

does not exist. .

ringa_lee · Answer

There should be code similar to this in opencv

include

namespace cv {
using std::vector;
}

高洛峰 · Answer

You are using cv::vector, not std::vector

include <opencv2/opencv.hpp>

include <iostream>

include <cassert>

include <cmath>

include <fstream>

include <vector>