update book code

eBook/examples/chapter_12/switch_input.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"bufio"
+)
+
+func main() {
+		inputReader := bufio.NewReader(os.Stdin)
+		fmt.Println("Please enter your name:")
+		input, err := inputReader.ReadString('\n')
+
+		if err != nil {
+			fmt.Println("There were errors reading, exiting program.")
+			return
+		}
+
+		fmt.Printf("Your name is %s", input)
+	 // For Unix: test with delimiter "\n", for Windows: test with "\r\n"
+		switch input {
+			case "Philip\r\n":	fmt.Println("Welcome Philip!")
+			case "Chris\r\n":	fmt.Println("Welcome Chris!")
+			case "Ivo\r\n":	    fmt.Println("Welcome Ivo!")
+			default: fmt.Printf("You are not welcome here! Goodbye!")
+		}
+
+	 // version 2:
+	    switch input {
+		    case "Philip\r\n":	fallthrough
+		    case "Ivo\r\n":	    fallthrough
+		    case "Chris\r\n":	fmt.Printf("Welcome %s\n", input)
+		    default: fmt.Printf("You are not welcome here! Goodbye!\n")
+	    }
+	
+	// version 3:
+	    switch input {
+	    	case "Philip\r\n", "Ivo\r\n":	fmt.Printf("Welcome %s\n", input)
+	    	default: fmt.Printf("You are not welcome here! Goodbye!\n")
+	    }
+}