diff --git a/pong.go b/pong.go
index bdc7ded..d454d57 100644
--- a/pong.go
+++ b/pong.go
@@ -8,6 +8,7 @@ import (
 	"pong/dial"
 	"pong/goping"
 	"strconv"
+	"time"
 )
 
 // 定义命令行参数对应的变量，这三个变量都是指针类型
@@ -21,14 +22,22 @@ pong www.baidu.com 443 -t 1 -k udp
 pong -a www.baidu.com -p 443 -k tcp -t 3
 `
 
-func main() {
+func main2() {
 	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt, os.Kill)
-
-	s := <-c
-	fmt.Println("Got signal:", s)
+	for {
+		select {
+		case s := <-c:
+			signal.Notify(c, os.Interrupt, os.Kill)
+			fmt.Println("Got signal:", s)
+			os.Exit(0)
+		default:
+			fmt.Println("okok")
+			time.Sleep(time.Second * 1)
+		}
+	}
 }
-func main1() {
+
+func main() {
 	address := flag.String("a", "", "domain or ip address")
 	port := flag.Int("p", 0, "port")
 	protocol := flag.String("k", "tcp", "protocol kind")