shell case循环写个计算器
刚学习shell的时候，写了一个娱乐的；想起来写在这里，希望大家不要jianxiao!#!/bin/bash
echo "先选择运算的种类 加减乘除，然后分别输入运费的数字就可以得到结果，输入时间为30秒"
read -p "Please enter the type of operation + or - or * or / :" -t 30 f
case "$f" in
"+")
read -p "Please enter the number1:" -t 30 numb1
read -p "Please enter the number2:" -t 30 numb2
typeset -i numb3="$numb1+$numb2"
echo $numb3
;;
"*")
read -p "Please enter the number1:" -t 30 numb1
read -p "Please enter the number2:" -t 30 numb2
typeset -i numb3="$numb1*$numb2"
echo $numb3
;;
"-")
read -p "Please enter the number1:" -t 30 numb1
read -p "Please enter the number2:" -t 30 numb2
typeset -i numb3="$numb1-$numb2"
echo $numb3
;;
"/")
read -p "Please enter the number1:" -t 30 numb1
read -p "Please enter the number2:" -t 30 numb2
typeset -i numb3="$numb1/$numb2"
echo $numb3
;;
*)
echo "error,Please re-run!"
esac
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