encoding/binary: add example for Read multi

Change-Id: I27ff99aa7abb070f6ae79c8f964aa9bd6a83b89d
Reviewed-on: https://go-review.googlesource.com/53730Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/encoding/binary/example_test.go

@@ -51,6 +51,30 @@ func ExampleRead() {
 	// Output: 3.141592653589793
 }
 
+func ExampleRead_multi() {
+	data := struct {
+		PI   float64
+		Uate uint8
+		Mine [3]byte
+		Too  uint16
+	}{}
+	b := []byte{0x18, 0x2d, 0x44, 0x54, 0xfb, 0x21, 0x09, 0x40, 0xff, 0x01, 0x02, 0x03, 0xbe, 0xef}
+	buf := bytes.NewReader(b)
+	err := binary.Read(buf, binary.LittleEndian, &data)
+	if err != nil {
+		fmt.Println("binary.Read failed:", err)
+	}
+	fmt.Println(data.PI)
+	fmt.Println(data.Uate)
+	fmt.Printf("% x\n", data.Mine)
+	fmt.Println(data.Too)
+	// Output:
+	// 3.141592653589793
+	// 255
+	// 01 02 03
+	// 61374
+}
+
 func ExampleByteOrder_put() {
 	b := make([]byte, 4)
 	binary.LittleEndian.PutUint16(b[0:], 0x03e8)