update book code

eBook/examples/chapter_12/readinput2.go

@@ -0,0 +1,22 @@
+// read input from the console:
+package main
+
+import (
+	"fmt"
+	"bufio"
+	"os"
+)
+
+var inputReader *bufio.Reader
+	var input string
+	var err error
+
+func main() {
+	inputReader = bufio.NewReader(os.Stdin)  // reader for input
+	fmt.Println("Please enter some input: ")
+	input, err = inputReader.ReadString('\n')
+
+	if err == nil {
+		fmt.Printf("The input was: %s\n", input)
+	}
+}