配置环境真是复杂的事情
C_INCLUDE_PATH
C:\MinGW\include;C:\MinGW\lib\gcc\mingw32\4.8.1\include
CPLUS_INCLUDE_PATH
C:\MinGW\include;C:\MinGW\lib\gcc\mingw32\4.8.1\include\c++;C:\MinGW\lib\gcc\mingw32\4.8.1\include\c++\backward;C:\MinGW\lib\gcc\mingw32\4.8.1\include\c++\mingw32
LIBRARY_PATH
C:\MinGW\lib;C:\MinGW\lib\gcc\mingw32\4.8.1