一个商品购买练习脚本

#!/bin/bash
read -p "请输入当前money:" qian
read -p "请输入工资:" gongzi
cat ./caidan
#read -p "请输入要购买的商品价格:" shangpin
kemai(){
awk 'BEGIN{FS=":"}{print $3}' caidan | while read jiage;do
if [ $1 -ge $jiage ];then
    mai=`awk 'BEGIN{FS=":"}/:'$jiage'$/{ print $0}' caidan` 
    echo $mai
fi
done
}
read -p "是否要输出可购买的商品[y/n]:" ans1
[ $ans1 = y ] && kemai $qian
yimai(){
    qian=$1
    while :;do
        read -p "请输入要购买的商品编号:" num1
        if awk 'BEGIN{FS=":"}{print $1}' caidan | grep $num1 &> /dev/null;then 
            jiage=`awk 'BEGIN{FS=":"}/^'$num1':/{print $3}' caidan`
            [ $qian -ge $jiage ] && qian=$[$qian - $jiage] && echo "你还剩余${qian}元"|| 
            {
                echo "你的钱不够!你只有${qian}元了" &&
                n=`echo "scale=1;( $jiage - $qian ) / $2" | bc`
                [ `echo ${n##*.}` -gt 0 ] && n=$[${n%%.*}+1]
                echo "你还需要收入${n}次工资才能购买"
                break
            }
        fi
    done
}
yimai $qian $gongzi

其中商品caidan文件格式如下:

1:自行车:100
2:汽车:1000
3:电脑:500

好吧,其实这是个py练习=.=