c++ - Opencv C++ : error: 'it' does not name a type

Question

这段代码在 windows 上运行完美，但我试图在 linux 上运行它，但它给出了这个错误:

In function ‘void kmline(cv::Mat, std::vector >&)’:| error: ‘it’ does not name a type| error: expected‘;’ before ‘it’| error: ‘it’ was not declared in this scope| ||=== Build failed: 3 error(s), 0

warning(s) (0 minute(s), 3 second(s)) ===|

代码:

void kmline( Mat image, std::vector<Point>& points )

{.
.
.
.
    if (points.size() > 1) //we have 2 points
        {

            for (auto it = points.begin(); it != points.end(); ++it)
            {


            }
        }

}

Answer 1

使用g++ main.cpp -std=c++11 -lopencv_core -lopencv_highgui 编译并添加using namespace cv；使用命名空间标准；并包含对我有用的内容。

#include <vector>
#include <stdio.h>
#include <opencv2/opencv.hpp>

using namespace cv;
using namespace std;

void kmline( Mat image, std::vector<Point>& points )

{
  if (points.size() > 1) //we have 2 points                                                                                                                                     
    {

      for (auto it = points.begin(); it != points.end(); ++it)
        {


        }

    }
}

int main()
{
  return 0;
}