growing the tutorial

R=gri
OCL=15115
CL=15115

1 files changed, 32 insertions, 0 deletions

diff --git a/doc/progs/echo.go b/doc/progs/echo.go
new file mode 100644
index 000000000..9dc828565
--- /dev/null
+++ b/doc/progs/echo.go
@@ -0,0 +1,32 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	OS "os";
+	Flag "flag";
+)
+
+var n_flag = Flag.Bool("n", false, nil, "don't print final newline")
+
+const (
+	Space = " ";
+	Newline = "\n";
+)
+
+func main() {
+	Flag.Parse();   // Scans the arg list and sets up flags
+	var s string = "";
+	for i := 0; i < Flag.NArg(); i++ {
+		if i > 0 {
+			s += Space
+		}
+		s += Flag.Arg(i)
+	}
+	if !n_flag.BVal() {
+		s += Newline
+	}
+	OS.Stdout.WriteString(s);
+}