package main

import "fmt"

func myFunc(arg interface{}) {
	fmt.Println("myFunc is called...")
	fmt.Println(arg)
	// interface{}的类型断言
	value, ok := arg.(string)
	if !ok {
		fmt.Println("arg is not string")
	} else {
		fmt.Println("arg is type, value = ", value)
		fmt.Printf("valut type is %T\n", value)
	}
}

type Book struct {
	auth string
}

func main() {
	book := Book{"Golang"}
	myFunc(book)
	myFunc(100)
	myFunc("abc")
	myFunc(3.14)
}