From e30be57a38170ea30807612e09523e79f8205941 Mon Sep 17 00:00:00 2001
From: obasang <805577846@qq.com>
Date: Thu, 11 Jul 2019 12:29:40 +0800
Subject: [PATCH] Update hello_who.go (#635)
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练习 12.5：hello_who.go 写一个"Hello World"的变种程序：把人的名字作为程序命令行执行的一个参数，
比如：hello_who Evan Michael Laura 那么会输出Hello Evan Michael Laura!
按照原实现，与题目中的示例不符
---
 eBook/exercises/chapter_12/hello_who.go | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/eBook/exercises/chapter_12/hello_who.go b/eBook/exercises/chapter_12/hello_who.go
index 2175689..dacef33 100755
--- a/eBook/exercises/chapter_12/hello_who.go
+++ b/eBook/exercises/chapter_12/hello_who.go
@@ -1,16 +1,16 @@
 // hello_who.go
 package main
-
+ 
 import (
 	"fmt"
-	"os"
+	"os"      
 	"strings"
 )
 
-func main() {
-	who := "World"
-	if len(os.Args) > 1 { // os.Args[0] == hello_who
-		who = strings.Join(os.Args[1:], " ")
+func main(){    
+	who := ""
+	if len(os.Args) > 1 {
+		who += strings.Join(os.Args[1:], " ")
 	}
-	fmt.Println("Hello", who, "!")
+	fmt.Printf("Hello %s!\n",who)
 }