45_类型断言之switch的使用

package main

import "fmt"

type Elementer interface{}

type Person struct {

	name string

	age  int

}

func main() {

	var list []Elementer = make([]Elementer, 3) //空接口类型

	list[0] = 1

	list[1] = "ads"

	list[2] = Person{"mike", 12}

	for index, element := range list {

		switch value := element.(type) { //注意这里是type

		case int:

			fmt.Printf("list[%d] is an int and its value is %d\n", index, value)

		case string:

			fmt.Printf("list[%d] is an int and its value is %d\n", index, value)

		case Person:

			fmt.Printf("list[%d] is an int and its value is [%s,%d]\n", index, value.name, value.age)

		}

	}

}