package main

import "fmt"

type Student struct {
	name string
	age int
}

type Desriber interface {
	Describe()
}


func (std Student) Describe(){
	fmt.Printf("%s and %d y.o",std.name,std.age)
}

func TypeDescriber(i interface{}){
	switch v := i.(type){
		case string:
			fmt.Println("I am string")
		case int:
			fmt.Println("I am int")
		case Desriber:
			fmt.Println("I am describer!")
			v.Describe()
		default:
			fmt.Println("Unknown type but I still work!")
	}
}

func main() {
	TypeDescriber(9)
	std := Student{"Alex", 19}
	TypeDescriber(std)
}