Source file doc/progs/echo.go

     1	// Copyright 2009 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	package main
     6	
     7	import (
     8		"os"
     9		"flag" // command line option parser
    10	)
    11	
    12	var omitNewline = flag.Bool("n", false, "don't print final newline")
    13	
    14	const (
    15		Space   = " "
    16		Newline = "\n"
    17	)
    18	
    19	func main() {
    20		flag.Parse() // Scans the arg list and sets up flags
    21		var s string = ""
    22		for i := 0; i < flag.NArg(); i++ {
    23			if i > 0 {
    24				s += Space
    25			}
    26			s += flag.Arg(i)
    27		}
    28		if !*omitNewline {
    29			s += Newline
    30		}
    31		os.Stdout.WriteString(s)
    32	}
The Go Programming Language

Source file doc/progs/echo.go
