运行opencv3.3 sample

opencv3.3 sample是个学习opencv的最佳方法，运行示例查看运行结果方法如下

1.打开D:\opencv3.3\samples\cpp\example_cmake

2.将需要运行的示例cpp文件copy至此，如：videocapture_basic.cpp

3.创建目录如：video-build

4.修改CMakeLists.txt最后2行为：

# Declare the executable target built from your sources
add_executable(videocapture_basic videocapture_basic.cpp)

# Link your application with OpenCV libraries
target_link_libraries(videocapture_basic ${OpenCV_LIBS})

5.cd至video-build

6.执行cmake -G "MinGW Makefiles" ..

7.make

8.运行videocapture_basic.exe