ATM取款机系统模拟仿真

#!/bin/sh
HOSTNAME="localhost"                                            #数据库信息
PORT="3306"
USERNAME="root"
PASSWORD=""
#数据库名称
DBNAME="bank"
TABLENAME="user"
#两个标记，用于判断是否超过输入
flag=1
flag1=1

#输入帐号密码成功后进行接下来操作
main()
{
echo "Please input what do you want to do ?(1、Balance inquiries 2、Change Password 3、draw money 4 、Deposit 5、exit) "
read choice
case $choice in

#查询余额
1 )
select_sql_money_now="select money from ${TABLENAME} where name='$name'"
nowmoney=` mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql_money_now}" |awk '{print $1}'|tail -n1`
echo "Balance inquiries is $nowmoney ￥"
main
;;

#修改密码
2)
echo "Please input the new password"
read newpassword
update_sql_password="update $TABLENAME set password=$newpassword where name='$name'"
mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${update_sql_password}"
main
;;

#取款
3)
echo "Please input how money do you want draw money"
read draw
select_sql_money_now="select money from ${TABLENAME} where name='$name'"
nowmoney=` mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql_money_now}" |awk '{print $1}'|tail -n1`
if [[ $draw -gt $nowmoney ]]
then
echo "The card money is little"
main
else
let "nowmoney=$nowmoney-$draw"
update_sql="update $TABLENAME set money=$nowmoney where name='$name'";
mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${update_sql}"
fi
main
;;

#存款
4)echo "Please input how money do you want Deposit money"
read deposit
select_sql_money_now="select money from ${TABLENAME} where name='$name'"
nowmoney=` mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql_money_now}" |awk '{print $1}'|tail -n1`
let "nowmoney=$nowmoney+$deposit"
update_sql="update $TABLENAME set money=$nowmoney where name='$name'";
mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${update_sql}"
main
;;

#退出系统
5)
echo "Now you level the system!!"
exit  ;;
esac
}

#输入密码函数
passwordfun()
{

read password
select_sql_pass="select password from ${TABLENAME} where name='$name'"
realpassword=` mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql_pass}" |awk '{print $1}'|tail -n1`
if [[ $password -eq $realpassword ]]
then
main
#密码不对，重新输入
elif [[ $password -ne $realpassword ]]
then
let   "flag++"
if [[ $flag -gt 4 ]]
then
echo "you password enter three times ,the system quit !!"
exit 0
fi
echo "sorry passwors is wrong,Please input password again"
passwordfun
fi
}

echo "Please input the card name:"    #输入用户名
#输入用户函数进行判断
namefun()
{
read name
select_sql_name="select name from ${TABLENAME} where name='$name'"
real=` mysql -h${HOSTNAME}   -P${PORT}   -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql_name}" |awk '{print $1}'|tail -n1`
if [[ -n $real ]] ; then
echo "Please input the password:"
passwordfun

#帐号不对，重新输入
else
let   "flag1++"
if [[ $flag1 -gt 4 ]]
then
echo "you name  enter three times ,the system quit !!"
exit 0
fi
echo "sorry name is wrong,Please input name again"
namefun
fi
}
namefun