go to coding file's path.
WIN7+Administrator@win7 MINGW64 /c/project/src/go_dev/leapyear
$ go build leapyear.go
WIN7+Administrator@win7 MINGW64 /c/project/src/go_dev/leapyear
$ ./leapyear.exe
please input a number of year:
2040
2040 is leapyaer.