Official website address: https://sourceforge.net/projects/mingw-w64/
[Step 1] : After entering the official website has been turned down, find the following interface
[Step 2] : choose the version they need
the meaning of the parameters: (1 ) representative of the x86_64 64, i686 32-bit behalf. (2) If you want to develop Windows programs, you need to choose win32, other programs developed under the operating system Linux, Unix, Mac OS, etc., you need to select posix. (3) seh performance is better, but does not support 32-bit. sjlj good stability, support for 32-bit.
So choose [x86_64-8.1.0-release-win32-seh- rt_v6-rev0 ], click, wait for the download interface will jump out.
[Step 3] : After decompression, after extracting the D: \ x86_64-8.1.0-release-win32- seh-rt_v6-rev0 / mingw64 / bin system environment variable path to path.
[Step 4] : Open CMD, input gcc -v, displays the following information represents a successful installation. 
OK, OVER!
