package main
import "fmt"
func main(){
 var pc map[string] string
 pc = make(map[string] string)
 pc["qingdao"] = "青岛"
 pc["jinan"] = "济南"
 pc["yantai"] = "烟台"
 qingdao,ok := pc["qingdao"]
 if ok{
  fmt.Println(qingdao) 
 }
}