10-2.sh

来自「linux下一些命令的c语言的实现」· Shell 代码 · 共 12 行

#filename: calculator
#!/bin/sh

while :
do
read expression
expression=`echo "$expression" | sed 's/\*/\\\*/'`
if [ "$expression" = "" ] ; then
        exit
fi
eval "expr $expression"
done