MinGW environment variable configuration

Right click My Computer, click Properties->Advanced->Environment Variables. Then:
1. Add C:/MinGW/bin to PATH, remember, if there are other variables in it, remember to add a semicolon, the semicolon must be input in English input mode.
2. Create a new LIBRARY_PATH variable, if any, add C:/MinGW/lib to the value, which is the location of the standard library.
3. Create a new C_INCLUDEDE_PATH variable and set the value to C:/MinGW/include.
4. Create a new CPLUS_INCLUDE_PATH variable with the value C:/MinGW/include/c++/3.4.5;C:/MinGW/include /c++/3.4.5;C:/MinGW/include/c++/3.4.5/backward;C :/MinGW/include.