//interface转其他类型————返回值是interface，直接赋值是无法转化的
 //interface 转string
 var a interface{}
 var str5 string
 a = "3432423"
 str5 = a.(string)
 fmt.Println(str5)
 
 //interface 转int
 var m interface{}
 var m1 int
 m = 43
 m1 = m.(int)
 fmt.Println(m1)
 
 //interface 转float64
 var ff interface{}
 var ff1 float64
 ff = 432.54
 ff1 = ff.(float64)
 fmt.Println(ff1)

func interface2String(inter interface{}) { 
  switch inter.(type) {
 
  case string:
    fmt.Println("string", inter.(string))
    break
  case int:
    fmt.Println("int", inter.(int))
    break
  case float64:
    fmt.Println("float64", inter.(float64))
    break
  } 
}
 
func main() {
  interface2String("jack")
  interface2String(1)
  interface2String(12.223)
}

string jack
int 1
float64 12.223