先安装Gfortran，再装CB，选择GNU Fortran编译器，
Codeblocks13.12搭载Fortran开发环境，设置compiler
step 1.settings——〉compiler——〉Selected compiler选择GNU Fortran Compiler ——〉Set as default
step 2. settings——〉compiler——〉Toolchain excutables:
C compiler: mingw32-gfortran.exe
C++ compiler: mingw32-gfortran.exe
Linker for dynamic libs: mingw32-gfortran.exe
Linker for static libs: ar.exe
Debugger : GDB/CDB debugger:Default
Resource compiler: windres.exe
Make program: mingw32-make.exe
注意，最后黑体的一定要设置好，因为完成step 1后step 2中前6项是自动设置，而是make program: make.exe。如果不改为Make program: mingw32-make.exe则会出现如下例子中的编译问题：
编译信息：
D:\fortran_programming\gauss\main.f95:19.16:
end module gauss
1
Fatal Error:can’t open module file'D:\fortran_programming\gauss\main.os_output_dir/gauss.mod0' for writing at (1): No such file or directory
Process terminated with status 1 (0 minute(s), 0 second(s))
1 error(s), 0 warning(s) (0 minute(s), 0 second(s))
最后新建一个project，修改f90文件即可
