178inaba · May 6, 2015 04:46
diff --git a/file0.go b/file0.go
 package main

 import (
    "flag"
    "fmt"
 )

 func main() {
    fmt.Println("flag.NArg():", flag.NArg())
 }
diff --git a/file1.txt b/file1.txt
 $ go run main.go a b c
 flag.NArg(): 0
diff --git a/file2.go b/file2.go
 package main

 import (
    "flag"
    "fmt"
 )

 func main() {
    flag.Parse()
    fmt.Println("flag.NArg():", flag.NArg())
 }
diff --git a/file3.txt b/file3.txt
 $ go run main.go a b c
 flag.NArg(): 3
diff --git a/file4.txt b/file4.txt
 $ go run main.go -a -b -c
 flag provided but not defined: -a
diff --git a/file5.go b/file5.go
 package main

 import (
    "flag"
    "fmt"
 )

 func main() {
    var i = flag.Int("i", 0, "usage")

    flag.Parse()

    fmt.Println(i)
 }
diff --git a/file6.txt b/file6.txt
 $ go run main.go
 0x2081a2230
diff --git a/file7.go b/file7.go
 package main

 import (
    "flag"
    "fmt"
 )

 func main() {
    var i = flag.Int("i", 0, "usage")

    flag.Parse()

    fmt.Println(*i)
 }
diff --git a/file8.txt b/file8.txt
 $ go run main.go
 0
 $ go run main.go -i=7
 7
	package main

	import (
	"flag"
	"fmt"
	)

	func main() {
	fmt.Println("flag.NArg():", flag.NArg())
	}