55 lines
1.3 KiB
Bash
55 lines
1.3 KiB
Bash
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#!/bin/bash
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round=0 #记录算了多少次
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while [ "$symbol" != '=' ] #用于持续接收用户输入的数字
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do
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read -p "请输入数字:" number #用于接收用户数字
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#计算乘除取余
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if [ "$symbol" == "/" ];
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then
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number=$[ ${numberarr[$round]} / number ]
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elif [ "$symbol" == "*" ];
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then
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number=$[ ${numberarr[$round]} * number ]
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elif [ "$symbol" == "%" ];
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then
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number=$[ ${numberarr[$round]} % number ]
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fi
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#如果计算了就覆盖刚刚的结果
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if [[ "$symbol" == "*" || "$symbol" == "/" || "$symbol" == "%" ]];
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then
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round=$[$round-1]
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fi
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read -p "请输入符号:" symbol #接收符号
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#判断符号有没有出错
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while [[ "$symbol" != "+" && "$symbol" != "-" && "$symbol" != "/" && "$symbol" != "*" && "$symbol" != "%" && "$symbol" != "=" ]];
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do
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read -p "请重新输入符号( + - * / % = )" symbol
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done
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#储存刚刚接收的数据
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symbolarr[$[round]]=$symbol
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numberarr[$[round]]=$number
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round=$[$round+1]
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done
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round=0 #重置次数
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sum=${numberarr[$round]} #获取第一位数
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#进行最后的计算
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while [ "${symbolarr[$round]}" != "=" ]
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do
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if [ "${symbolarr[$round]}" == "+" ];
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then
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sum=$[ "$sum" + "${numberarr[$[$round+1]]}" ]
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else
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sum=$[ "$sum" - "${numberarr[$[$round+1]]}" ]
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fi
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round=$[$round+1] #进行次数增加
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done
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echo "计算结果为$sum"
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