用shell脚本猜大小

创建shell脚本环境

vim guess

极简猜大小

echo $1
if [ $1 -gt 12 ]; then
        echo "猜大了"
elif [ $1 -lt 12 ]; then
        echo "猜小了"
else 
        echo "猜对了"
        break
fi

用while语句 猜大小

while true; do
echo "请输入一个数字"
read aa;
if [ $aa -gt 12 ]; then
        echo "猜大了"
elif [ $aa -lt 12 ]; then
        echo "猜小了"
else 
        echo "猜对了"
        break
fi
done