请教：尝试opencv2.4.13在linux下编译程序的报错

Question

源代码：#include

#include

#include

using namespace cv;

int main()

{

VideoCapture cap(0);
if(!cap.isOpened())

{

return -1;

}

Mat frame;

bool stop = false;

while(!stop)

{

cap.read(frame);

imshow("Video",frame);

if(waitKey(30)==27) //Esc键退出

{

stop = true;

}

}

return 0;

}

报错:~$ g++ -o opencvq opencv.cpp
/tmp/ccQJKVIi.o: In function main':
opencv.cpp:(.text+0x29): undefined reference tocv::VideoCapture::VideoCapture(int)'
opencv.cpp:(.text+0x38): undefined reference to cv::VideoCapture::isOpened() const'
opencv.cpp:(.text+0x80): undefined reference tocv::VideoCapture::read(cv::Mat&)'
opencv.cpp:(.text+0xf9): undefined reference to cv::Mat::ones(cv::Size_<int>, int)'
opencv.cpp:(.text+0x146): undefined reference tocv::VideoCapture::read(cv::Mat&)'
opencv.cpp:(.text+0x33d): undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)'
opencv.cpp:(.text+0x356): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
opencv.cpp:(.text+0x36f): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
opencv.cpp:(.text+0x3a1): undefined reference tocv::addWeighted(cv::_InputArray const&, double, cv::_InputArray const&, double, double, cv::_OutputArray const&, int)'
opencv.cpp:(.text+0x3ba): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
opencv.cpp:(.text+0x3fd): undefined reference tocv::imshow(std::string const&, cv::_InputArray const&)'
opencv.cpp:(.text+0x425): undefined reference to cv::waitKey(int)'
opencv.cpp:(.text+0x489): undefined reference tocv::VideoCapture::~VideoCapture()'
opencv.cpp:(.text+0x51a): undefined reference to cv::VideoCapture::~VideoCapture()'
/tmp/ccQJKVIi.o: In functioncv::Mat::~Mat()':
opencv.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x39): undefined reference to cv::fastFree(void*)'
/tmp/ccQJKVIi.o: In functioncv::Mat::release()':
opencv.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x47): undefined reference to cv::Mat::deallocate()'
/tmp/ccQJKVIi.o: In functioncv::Mat::operator()(cv::Rect_ const&) const':
opencv.cpp:(.text._ZNK2cv3MatclERKNS_5Rect_IiEE[_ZNK2cv3MatclERKNS_5Rect_IiEE]+0x27): undefined reference to `cv::Mat::Mat(cv::Mat const&, cv::Rect_ const&)'
collect2: error: ld returned 1 exit status

第一次使用，在此请教各位前辈，谢谢了

Answer 1

缺少头文件，编译的时候没有导入依赖库