shell猜数字脚本

2、计算器

[root@mapogo    Thu Jun 23 16:47:10   
 /tist_shell]# cat jis.sh 
#!/bin/bash

num1=$1
fuhao=$2
num2=$3

echo "计算结果:$1$2$3=$[ $1 $2 $3]"

[root@mapogo    Thu Jun 23 16:49:09   
 /tist_shell]# cat jisuan.sh 
#!/bin/bash
read -p "请输入第一个数：" num1
read -p "请输入运算符：" fuhao
read -p "请输入第二个数" num2

if [ "$fuhao" == "+" ]
then
        echo $num1+$num1=$(($num1 + $num2))
elif [ "$fuhao" == "-" ]
then
        echo $num1-$num2=$(($num1 - $num2))
elif [ "$fuhao" == "*" ]
then
        echo $num1*$num2=$(($num1 * $num2))
elif [ "$fuhao" == "/" ]
then
        echo $num1/$num2=$(($num1 / $num2))
 else
        echo "你是个憨憨"

fi