这个go switch语句有什么问题？

Question

Can anybody see why this switch won't work?

func main() {

    reader := bufio.NewReader(os.Stdin)
    text, _ := reader.ReadString('
')

    fmt.Print(text)

    switch text {
    case "a":
        fmt.Print("A
")
    case "b":
        fmt.Print("B
")
    case "c":
        fmt.Print("C
")
    default:
        fmt.Print("DEFAULT
")
    }
}   

In this statement, the default value is always returned yet when hard coding the switch expression, the switch block works as it should. Looking at the ReadString() func code, it returns a string so I can't see any reason for my example to not work.

Am I doing something wrong?!

Answer 1

Your text consists of two bytes: fmt.Print(len(text)) is 2 and fmt.Print(len("a")) is one.

You the second symbol is invisible and you can try to remove it with text = strings.TrimSpace(text).