安装的eclipse c++版本，新建后的c++项目，自动添加include
但是添加lib需要手动设置
1、头文件：project->properties->c/c++ build->settings->gcc c++ compiler->includes
2、库文件：project->properties->c/c++ build->settings->gcc c++ linker->libraries下面
libaries（-l）：添加比如highgui，cv，cxcore, mysqlclient, ncurses.....
library search path（-L）：添加lib文件所在目录