C語言環境變數的配置和驗證
（1）下載 MinGW 工具包：https://www.onlinedown.net/soft/577868.htm
我是放在 D 盤 java 資料夾裡面：然後解壓後直接在電腦環境變數配置：
MinGW_HOME = D:\Java\mingw7.2.0\64-bits
path = %MinGW_HOME%\bin;%MinGW_HOME%\x86_64-w64-mingw32\include;
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（2）檢視是否安裝成功：gcc -v
展示：
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=d:/java/mingw7.2.0/64-bits/bin/../libexec/gcc/x86_64-w64-mingw32/7.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../source/gcc-7.2.0/configure --build=x86_64-pc-mingw32 --target=x86_64-w64-mingw32 --disable-shared --enable-static --disable-nls --disable-multilib --prefix=/r/make6t4/newsystem/mingw-w64-x86_64 --with-sysroot=/r/make6t4/newsystem/mingw-w64-x86_64 --with-mpc=/r/make6t4/newsystem/pkgs/mpc/mpc-1.0.3-x86_64 --with-mpfr=/r/make6t4/newsystem/pkgs/mpfr/mpfr-3.1.5-x86_64 --with-gmp=/r/make6t4/newsystem/pkgs/gmp/gmp-6.1.2-x86_64 --with-isl=/r/make6t4/newsystem/pkgs/isl/isl-0.16.1-x86_64 --enable-languages=c,c++ --enable-fully-dynamic-string --enable-lto
Thread model: win32
gcc version 7.2.0 (GCC)
即是安裝成功。