阿铭每日一题 day 2 20180112

 

 

方法一：

 1 #!/bin/bash
 2 
 3 echo "*cmd meau** 1--date 2--ls 3--who 4--pwd"
 4 read -p "Please input number:" number
 5 case $number in
 6 1)
 7 date
 8 ;;
 9 2)
10 ls
11 ;;
12 3)
13 who
14 ;;
15 4)
16 pwd
17 ;;
18 *)
19 echo -e "\n"
20 echo "Please input number 1-4!!!"
21 ;;
22 esac

 

方法二：

 1 #!/bin/bash
 2 echo "Pleae chose a number"
 3 select number in date ls who pwd
 4 do
 5 case $number in
 6 date)
 7     date
 8     ;;
 9 ls)
10     ls
11     ;;
12 who)
13     who
14     ;;
15 pwd)
16     pwd
17     ;;
18 *)
19     echo "Please inpurt number 1-4"
20     ;;
21 esac
22 done

 

 

day2 解析：

1、使用case语法就可以实现啦，不用想的太复杂

 

day2=参考答案=~ps.不是唯一答案哦

 1 #!/bin/bash
 2 echo "*cmd meau** 1--date 2--ls 3--who 4--pwd"
 3 read -p "Please input number:" number
 4 case $number in
 5 1)
 6 date
 7 ;;
 8 2)
 9 ls
10 ;;
11 3)
12 who
13 ;;
14 4)
15 pwd
16 ;;
17 *)
18 echo -e "\n"
19 echo "Please input number 1-4!!!"
20 ;;
21 esac

 

转载于:https://www.cnblogs.com/ivan-yang/p/8323523.html