update book code

eBook/examples/chapter_11/static.go

@@ -0,0 +1,23 @@
+// static.go
+package main
+
+import (
+	"io"
+	"os"
+	"bufio"
+	"bytes"
+	"fmt"
+)
+
+var r io.Reader
+
+func main() {
+	r = os.Stdin
+	r = bufio.NewReader(r)
+	r = new(bytes.Buffer)
+	f, _ := os.Open("test.txt")
+	r = bufio.NewReader(f)
+	var s *bytes.Buffer = new(bytes.Buffer)
+	r = s
+	fmt.Println(s)
+}