刚玩了玩控制语句，与大家共勉 - 中国DOS联盟论坛

刚装上RED HAT 9 初学SHELL 以下是控制语句的练习，与大家共勉：#!/bin/bash
cat<<EOF1

hello ! everybody who likes LINUX shell
here's a mini script test for LINUX shell as follows:
the first, enter two numbers (for us to see if they match our needs, as well),
and then choose one action from ADDING, SUBTRACTION
MULTIPLICATION and DIVISION. and finally you'll see the result
thank you for cooperation !
EOF1
sleep 2
cat<<EOF
if you want to view the shell script, enter "y"
(press SPACE to next page, PAGEUP to previous page, PAGEDOWN to next page
ARROWs to more or less lines, "q" to quit "view"

otherwise, enter "n"
EOF
read look
if
then
clear
less $0
else
echo "let's go ahead !"
fisleep 2
echo "please give first number, then press ENTER"
read num1
echo "please give second number, then press ENTER"
read num2
((sum=$num1+$num2))echo "the numbers you just put in are:"
for num in $num1 $num2
do
echo $num
done
sleep 3while
do
clear
echo "the numbers you gave doesn't match our needs"
echo "you haven't passed obstacle 1"
echo "we have to start it again!"
sleep 10
$0
doneecho "congradulations! you've passed obstacle 1"
echo "let's go on"
sleep 2until
do
clear
echo "the numbers you gave still doesn't match our needs"
echo "you haven't passed obstacle 2"
echo "we have to start it again!"
sleep 10
$0
done
echo "congradulations! you've passed obstacle 2"
echo "let's go on"cat<<EOF2
if you choose ADDING, please enter "a"
if you choose SUBTRACTION, please enter "s"
if you choose MULTIPLICATION, please enter "m"
if you choose DIVISION, please enter "d"
if you want to exit, please enter any other keys
EOF2read action
case $action in
a|A)
echo "working ..."
sleep 2
echo $
echo $?
echo done
;;s|S)
echo "working ..."
sleep 2
echo $
echo done
;;m|M)
echo "working ..."
sleep 2
echo $
echo done
;;d|D)
echo "working ..."
sleep 2
echo $
echo done
;;*)
cat<<EOF3
if you're sure to quit, enter "y"
if you want to view the shell script, enter "v"
(press SPACE to next page, PAGEUP to previous page, PAGEDOWN to next page
ARROWs to more or less lines, "q" to quit "view"

if you want to romove the shell script, enter "r"
if you want to rerun the shell, enter any other keys
EOF3
read quit
if
then
exit
elif
then
less $0
elif
then
rm -f $0
else
clear
cat<<EOF4

START FROM THE SCRATCH !
EOF4
sleep 1
clear
$0
fi
;;esac

第1楼　GOTOmsdos	发表于 2004-12-15 00:00
铂金会员　发帖 1,827　积分 5,154
刚玩了玩控制语句，与大家共勉刚装上RED HAT 9 初学SHELL 以下是控制语句的练习，与大家共勉：#!/bin/bash cat<<EOF1 hello ! everybody who likes LINUX shell here's a mini script test for LINUX shell as follows: the first, enter two numbers (for us to see if they match our needs, as well), and then choose one action from ADDING, SUBTRACTION MULTIPLICATION and DIVISION. and finally you'll see the result thank you for cooperation ! EOF1 sleep 2 cat<<EOF if you want to view the shell script, enter "y" (press SPACE to next page, PAGEUP to previous page, PAGEDOWN to next page ARROWs to more or less lines, "q" to quit "view" otherwise, enter "n" EOF read look if then clear less $0 else echo "let's go ahead !" fisleep 2 echo "please give first number, then press ENTER" read num1 echo "please give second number, then press ENTER" read num2 ((sum=$num1+$num2))echo "the numbers you just put in are:" for num in $num1 $num2 do echo $num done sleep 3while do clear echo "the numbers you gave doesn't match our needs" echo "you haven't passed obstacle 1" echo "we have to start it again!" sleep 10 $0 doneecho "congradulations! you've passed obstacle 1" echo "let's go on" sleep 2until do clear echo "the numbers you gave still doesn't match our needs" echo "you haven't passed obstacle 2" echo "we have to start it again!" sleep 10 $0 done echo "congradulations! you've passed obstacle 2" echo "let's go on"cat<<EOF2 if you choose ADDING, please enter "a" if you choose SUBTRACTION, please enter "s" if you choose MULTIPLICATION, please enter "m" if you choose DIVISION, please enter "d" if you want to exit, please enter any other keys EOF2read action case $action in a\|A) echo "working ..." sleep 2 echo $ echo $? echo done ;;s\|S) echo "working ..." sleep 2 echo $ echo done ;;m\|M) echo "working ..." sleep 2 echo $ echo done ;;d\|D) echo "working ..." sleep 2 echo $ echo done ;;*) cat<<EOF3 if you're sure to quit, enter "y" if you want to view the shell script, enter "v" (press SPACE to next page, PAGEUP to previous page, PAGEDOWN to next page ARROWs to more or less lines, "q" to quit "view" if you want to romove the shell script, enter "r" if you want to rerun the shell, enter any other keys EOF3 read quit if then exit elif then less $0 elif then rm -f $0 else clear cat<<EOF4 START FROM THE SCRATCH ! EOF4 sleep 1 clear $0 fi ;;esac