Operation and Maintenance
Linux Operation and Maintenance
Detailed explanation of examples of library management system implemented in Linux shell
Detailed explanation of examples of library management system implemented in Linux shell
本文主要介绍了shell实现图书管理系统，具有一定的参考价值，感兴趣的小伙伴们可以参考一下，希望能帮助到大家更好的学习shell。
本文实例为大家分享了shell实现图书管理系统的具体代码，供大家参考，具体内容如下
#!/bin/bash
#author:zhanghongjun
#version:1.0
#date:2011年 12月 14日 星期三 21:18:18 CST
function information
{
echo "---------------------------"
echo "图书馆管理系统（5.4版本）"
echo
echo -n "| " ;echo "1:添加图书"
echo -n "| " ;echo "2:删除图书"
echo -n "| " ;echo "3:图书列表"
echo -n "| " ;echo "4:查找图书"
echo -n "| " ;echo "5|q:退出系统"
echo
echo "---------------------------"
read -p "请输入你的选择:" a
case "$a" in
1)
add ;;
2)
delete ;;
3)
list ;;
4)
search;;
5|q|Q)
return -1 ;;
*)
information ;;
esac
}
function file_exist
{
if [ ! -f .book.txt ];then
touch .book.txt
fi
}
function add
{
read -p "请输入图书的编号：" number
read -p "请输入图书的书名：" book_name
read -p "请输入图书的作者：" author
read -p "请输入图书的价格：" price
echo -e "$number\t$book_name\t$author\t$price" >>.book.txt && {
echo "添加图书成功！"
echo "-------------------"
}
if [ $? -ne 0 ];then
echo "添加图书失败"
fi
information
}
function delete
{
read -p "请输入要删除的图书的编号：" number
grep $number .book.txt &>/dev/null && {
sed -i '/\<'$number'\>/d' .book.txt &>/dev/null &&
echo "删除图书成功"
echo "-------------------------"
}
if [ $? -ne 0 ];then
echo "删除图书失败"
echo "你要删除的图书不存在"
fi
information
}
#列出所有图书的信息
function list
{
echo -e "编号\t书名\t作者\t价格"
cat .book.txt
echo "----------------------------"
information
}
#下面的函数用到的查询菜单
function search_menu
{
echo;echo "----------------------------"
echo -n "|";echo -e "1：\t按图书编号查询"
echo -n "|";echo -e "2：\t按图书书名查询"
echo -n "|";echo -e "3：\t按图书作者查询"
echo -n "|";echo -e "4：\t按图书价格查询"
echo -n "|";echo -e "5|q：\t退出查询系统"
echo;echo "----------------------------"
}
function search
{
search_menu
read -p "请输出你的选择：" myselect
case "$myselect" in
1)
read -p "请输入要查询的图书的编号：" mynumber
echo -e "编号\t书名\t作者\t价格\n"
awk '$1=='$mynumber'{print $0}' .book.txt 2>/dev/null
if [ $? -ne 0 ];then
echo "图书不存在"
fi
search
;;
2)
read -p "请输入你要查询的书名：" mybook_name
echo -e "编号\t书名\t作者\t价格\n"
awk '$2~/'$mybook_name'/{print $0}' .book.txt 2>/dev/null
if [ $? -ne 0 ];then
echo "图书不存在"
fi
search
;;
3)
read -p "请输入图书的作者：" myauthor
echo -e "编号\t书名\t作者\t价格\n"
awk '$3~/'$myauthor'/{;print $0}' .book.txt 2>/dev/null
if [ $? -ne 0 ];then
echo "图书不存在"
fi
search
;;
4)
read -p "请输入图书的价格：" myprice
echo -e "编号\t书名\t作者\t价格\n"
awk '$4=='$myprice'{print $0}' .book.txt 2>/dev/null
if [ $? -ne 0 ];then
echo "图书不存在"
fi
search
;;
5)
information
;;
*)
information
;;
esac
}
information相关推荐：
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