Linux bash shell.sh编程实例

1.输出#！/bin/bashecho "Please type your number:"read afor （（i=1;i<=a;i++））dofor （（p=1;p<=i;p++））doecho -n " $p "doneechodoneecho
2.九九乘法表#！/bin/bashfor （（i=1;i<10;i++））dofor （（p=1;p<=i;p++））doecho -ne " $p x $i= "`expr $i * $p`doneechodoneecho
3.计算器#！/bin/bashs=0while trueecho "..............+"echo "..............-"echo "..............x"echo "............../"echo "..............q" echo "Please type your word:（e.g.1 + 2）"read a b cdocase $b in+）let s=a+cecho " $a + $c =" $s;;-）let s=a-cecho " $a - $c =" $s;;x）let s=a*cecho " $a x $c =" $s;;/）let s=a/cecho " $a / $c =" $s;;esac case $a inq） break ;;
esacdone
4.菱形#！/bin/bashecho "Please type a number:"read numfor （（i=1;i<=num;i++））dofor （（j=0;j<num-i;j++））doecho -n " "donefor （（j=0;j<2*i-1;j++））doecho -n "*"doneecho ""donefor （（i=1;i<=num;i++））dofor （（j=0;j<i;j++））doecho -n " "donefor （（j=0;j<2*（num-i）-1;j++））doecho -n "*"doneecho ""done
5. 输出当前目录下所有文件，并输出文件总数和目录总数#！/bin/bashls -alfilenum=0dirnum=0for q in `ls -a`doif [ -d $q ]thendirnum=`expr $dirnum + 1`fifilenum=`expr $filenum + 1`doneecho "The number of dirctary is $dirnum"echo "The number of file is $filenum"
6.菜单#！/bin/bashwhile trueecho "List Directory..........l "echo "Change Directory........c "echo "Edit File...............e "echo "Remove File.............r "echo "Exit Menu...............q "read chdocase $ch inl） ls;;c） echo Enter target directoryread direccd "$direc" ;;
e） echo Enter file nameread filevi $file ;;
r） echo Enter file nameread filerm $file ;;
q|Q） echo Goodbyebreak;;
*） echo illegal Optionesacdone