Implementation of Golang standard library flag Package implementation command line parsing

Golang The flag package is used to parse the command-line arguments, see the following simple example:

Package Main

Import (
"FMT"
"Flag"
)

Func Main () {

Use flag. The String () function registers the flag, obtains the result conf pointer
var conf = flag. String ("F", "test.conf", "specify" config file)

You can also bind flag to a variable
var Int_var int
Flag. Intvar (&int_var, "I", MB, "just a test int")

Parsing commands
Flag. Parse ();

Fmt. Println (*conf)
Fmt. Println (Int_var)
}

Operation Effect:

mckee@mckee-thinkpad:~/program/go/test/src/test$ Go run test.go-f/etc/test.conf-i 11111
/etc/test.conf
11111