connect prometh param

main.go

 package main
 
 import (
+	"flag"
 	"fmt"
 	"log"
 
@@ -13,7 +14,16 @@ import (
 func main() {
 	//ExampleAPI_query()
 
-	cli, err := NewProCli("http://192.168.1.21:9090")
+	promethAddr := flag.String("promethaddr", "http://127.0.0.1:9090", "a string parameter")
+
+	flag.Parse()
+
+	//cli, err := NewProCli("http://192.168.1.21:9090")
+	fmt.Println("connect to prometh addr-----------", *promethAddr)
+
+	//cli, err := NewProCli("http://192.168.1.21:9090")
+
+	cli, err := NewProCli(*promethAddr)
 
 	if err != nil {
 		fmt.Println(err.Error())