Home>Article>Operation and Maintenance> 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
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