abc

website/content/ChapterOne/Fuza_Function2.md

@@ -176,5 +176,5 @@ exit 0
 
 <div style="display: flex;justify-content: space-between;align-items: center;">
 <p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function">上一页➡️</a></p>
-<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/">下一页➡️</a></p>
+<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function3">下一页➡️</a></p>
 </div>

website/content/ChapterOne/Fuza_Function3.md

@@ -0,0 +1,37 @@
+---
+title: 1.04 函数使用重定向标准输入   
+type: docs
+weight: 1
+---
+
+#  获取用户名   
+exp1：   
+```bash
+#!/bin/bash
+
+ARGCOUNT=1
+E_ARGEXIT=65
+FILE=/etc/passwd
+
+if [ $# -ne $ARGCOUNT ]
+then
+  echo "Usage: `basename $0` USERNAME"
+  exit $E_ARGEXIT
+fi
+
+find_user ()
+{
+  while read line
+  do
+    echo "$line" | awk -F ":" '{print $5}' | grep $1
+  done  
+}<$FILE
+
+find_user $1
+exit 0
+```   
+
+<div style="display: flex;justify-content: space-between;align-items: center;">
+<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function2">上一页➡️</a></p>
+<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function4">下一页➡️</a></p>
+</div>

website/content/ChapterOne/Fuza_Function4.md

@@ -0,0 +1,32 @@
+---
+title: 1.05 函数使用局部变量   
+type: docs
+weight: 1
+---
+
+# 局部变量与全局变量   
+exp:
+```bash
+#!/bin/bash
+
+func ()
+{
+  local a=5
+  b=10
+}
+
+func
+
+echo "\"a\" is equal $a"
+echo "\"b\" is equal $b"
+```   
+执行脚本输出     
+"a" is equal 
+"b" is equal 10    
+
+**ps:函数内没有使用local声明的变量均是全局变量**   
+
+<div style="display: flex;justify-content: space-between;align-items: center;">
+<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function3">上一页➡️</a></p>
+<p><a href="https://books.linuxwt.com/linuxwtabs/ChapterOne/Fuza_Function5">下一页➡️</a></p>
+</div>