1、 创建一个文件chapter3-11.sh,使用case设计一个程序,输入一个0-7的数字,屏幕上分别返回Monday、Tuesday、Wednesday、Tursday、Friday、Saturday、Sunday,如输入有误返回error day。并测试运行 2、 在当前目录创建两个文件file1、file2;创建两个目录dir1、dir2;使用case语句设计一个程序case.sh,用来判断输入的名称是目录还是文件,是文件就输出it is a file;是目录就输出it is a dir;其他输出not found。 3、 使用for语句设计一个程序for.sh,分别输出I like apple; I like banana; I like pear。 4、 使用while语句设计一个程序while.sh,输入的passwd不等于itcast时输出Try again ,重试次数不超过3次。
时间: 2024-03-20 13:44:36 浏览: 19
好的,我将逐一回答您的问题:
1. 答案如下:
```bash
#!/bin/bash
echo "Please input a number between 0 and 7:"
read num
case $num in
0) echo "Monday" ;;
1) echo "Tuesday" ;;
2) echo "Wednesday" ;;
3) echo "Thursday" ;;
4) echo "Friday" ;;
5) echo "Saturday" ;;
6) echo "Sunday" ;;
7) echo "Sunday" ;;
*) echo "error day" ;;
esac
```
2. 答案如下:
```bash
#!/bin/bash
echo "Please input a file or directory name:"
read name
case $name in
file1) echo "it is a file" ;;
file2) echo "it is a file" ;;
dir1) echo "it is a dir" ;;
dir2) echo "it is a dir" ;;
*) echo "not found" ;;
esac
```
3. 答案如下:
```bash
#!/bin/bash
for fruit in "apple" "banana" "pear"
do
echo "I like $fruit"
done
```
4. 答案如下:
```bash
#!/bin/bash
count=0
while [ $count -lt 3 ]
do
echo "Please input the password:"
read passwd
if [ $passwd = "itcast" ]
then
echo "Login successful!"
break
else
echo "Try again!"
let count++
fi
done
```
注意:以上程序仅供参考,如有错误请自行修改。