#!/bin/bash #author:zhanghongjun #version:1.0 #date: 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 "$a" in1) add ;; 2) delete ;; 3) list ;; 4) search;; 5|q|Q) return -1 ;; *) information ;; esac } function file_exist { if [ ! -f .book.txt ];thentouch .book.txt fi} function add { read -p "请输入图书的编号：" number read -p "请输入图书的书名：" book_name read -p "请输入图书的作者：" author read -p "请输入图书的价格：" price echo -e "$number\t$book_name\t$author\t$price" >>.book.txt && { echo "添加图书成功！"echo "-------------------"} if [ $? -ne 0 ];thenecho "添加图书失败"fiinformation } 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 [ $? -ne 0 ];thenecho "删除图书失败"echo "你要删除的图书不存在"fiinformation } #列出所有图书的信息 function list { echo -e "编号\t书名\t作者\t价格"cat .book.txt echo "----------------------------"information } #下面的函数用到的查询菜单 function search_menu { echo;echo "----------------------------" echo -n "|";echo -e "1：\t按图书编号查询"echo -n "|";echo -e "2：\t按图书书名查询"echo -n "|";echo -e "3：\t按图书作者查询"echo -n "|";echo -e "4：\t按图书价格查询"echo -n "|";echo -e "5|q：\t退出查询系统"echo;echo "----------------------------" } function search { search_menu read -p "请输出你的选择：" myselect case "$myselect" in1) 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 ];thenecho "图书不存在"fisearch ;; 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/nullif [ $? -ne 0 ];thenecho "图书不存在"fisearch ;; 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/nullif [ $? -ne 0 ];thenecho "图书不存在"fisearch ;; 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/nullif [ $? -ne 0 ];thenecho "图书不存在"fisearch ;; 5) information ;; *) information ;; esac } information
