#!/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 "$a" in 1) add ;
;
2) delete ;
;
3) list ;
;
4) search;
;
5|q|Q) return -1 ;
;
*) information ;
;
esac }
function file_exist {
if [ ! -f .book.txt ];
then touch .book.txt fi }
function add {
read -p "请输入图书的编号：" number read -p "请输入图书的书名：" book_name read -p "请输入图书的作者：" author read -p "请输入图书的价格：" price echo -e "$numbert$book_namet$authort$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