mirror of
https://github.com/gopl-zh/gopl-zh.github.com.git
synced 2024-11-05 14:03:45 +00:00
28 lines
454 B
Go
28 lines
454 B
Go
|
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
|
||
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
||
|
|
|
||
|
|
// See page 33.
|
||
|
|
//!+
|
||
|
|
|
||
|
|
// Echo4 prints its command-line arguments.
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"flag"
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
var n = flag.Bool("n", false, "omit trailing newline")
|
||
|
|
var sep = flag.String("s", " ", "separator")
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
flag.Parse()
|
||
|
|
fmt.Print(strings.Join(flag.Args(), *sep))
|
||
|
|
if !*n {
|
||
|
|
fmt.Println()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//!-
|