package main
 
 
import "os"
import "fmt"
 
 
type Human interface {
  sayHello()
}
 
 
type Chinese struct {
  name string
}
 
 
type English struct {
  name string
}
 
 
func (c *Chinese) sayHello() {
  fmt.Println(c.name,"说：你好，世界")
}
 
 
func (e *English) sayHello() {
  fmt.Println(e.name,"says: hello,world")
}
 
 
func main() {
  fmt.Println(len(os.Args))
   
  c := Chinese{"汪星人"}
  e := English{"jorn"}
  m := map[int]Human{}
   
  m[0] = &c
  m[1] = &e
   
  for i:=0;i<2;i++ {
    m[i].sayHello()
  }
}