Unix Shell Programming
Extracts from this document...
Introduction
(2009 – 2010)
No. | Programs | Page |
1 | PROGRAM TO ADD AND MULTIPLY TWO NUMBERS | 3 |
2 | PROGRAM TO CALCULATE THE FACTORIAL OF A NUMBER | 4 |
3 | PROGRAM TO CHECK A NUMBER WHEATHER IT IS A PRIME NUMBER OR NOT | 5 |
4 | PROGRAM TO CHECK A NUMBER WHEATHER IT IS AN ARMSTRONG NUMBER OR NOT | 6 |
5 | PROGRAM TO CHECK A NAME WHEATHER IT IS A PALINDROME OR NOT | 7 |
6 | PROGRAM TO READ A NUMBER AND PRINT THE NUMBER IN WORDS | 8-9 |
7 | PROGRAM TO PRINT THE FIBONACCI SERIES | 10 |
8 | PROGRAM TO FIND THE QUOTIENT AND THE REMAINDER BETWEEN TWO NUMBERS WITHOUT USING ‘/’ AND ‘%’ OPERATOR | 11 |
9 | PROGRAM TO FIND THE GREATEST NUMBER AMONG THE THREE NUMBERS | 12 |
10 | PROGRAM TO INPUT A FEW NUMBER IN AN ARRAY AND DISPLAY THE NUMBERS WHICH ARE GREATER THAN THE AVERAGE OF ALL THE NUMBERS | 13 |
11 | PROGRAM TO PRINT A WORD IN ALL IT’S PROBABLE OR POSSIBLE WAYS | 14 |
12 | PROGRAM TO CALCULATE THE AGE | 15 |
13 | PROGRAM TO REVERSE AN INTEGER NUMBER | 16 |
14 | PROGRAM TO FIND THE THE DIVISION ON AVERAGE MARKS | 17 |
15 | PROGRAM TO FIND THE EXE FILES OF A PWD | 18 |
16 | PROGRAM TO SHOW THE CONTENTS OF A FILE IF IT IS READABLE | 19 |
17 | PROGRAM TO COUNT THE WRITABLE FILES OF A PWD | 20 |
18 | PROGRAM TO READ A FILENAME AND SHOW THE CONTENTS OF A READABLE FILE IF THE NAME IS OF A DIRECTORY FILE OR SHOW THE CONTENTS IF IT IS A NORMAL FILE OTHERWISE IF IT IS A BLOCK SPECIAL OR CHARACTER SPECIAL FILE THEN SHOW THAT IT IS A SPECIAL FILE | 21 |
Middle
y = ‘ expr $name|cut –c $i ‘
...read more.
z = ‘ expr $name|cut –c $j ‘
if = [ $i!= $z ]
then
flag = 1
fi
i = ‘ expr $name|cut –c $i ‘
done
if [$flag –eq 1]
then
echo The name is a Palindrome.
else
echo The name is not a Palindrome.
fi
OUTPUT
Enter a name: KANAK
The name is a Palindrome.
-:PROGRAM TO READ A NUMBER AND PRINT THE NUMBER IN WORDS:-
SOURCE CODE
echo Enter a number:
read num
ct = ‘ expr $num|wc –c ‘
ct = ‘ expr $ct -1 ‘
i = 1
p = 2
while [ $i –le $ct]
do
if [ $p –eq $ct ]
then
case $num in
10) echo Ten ;;
11) echo Eleven ;;
12) echo Twelve;;
13) echo Thirteen ;;
14) echo Fourteen ;;
15) echo Fifteen ;;
16) echo Sixteen ;;
17) echo Seventeen ;;
18) echo Eighteen ;;
19) echo Nineteen ;;
*) p = 1
esac
if [ $p –eq 1 ]
then
c = ‘ echo $num|cut –c $i ‘
case $c in
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
2) 1= ‘Twenty’ ;;
esac
p = 3
fi
if [ $num –le 19]
then
exit
fi
c = ‘ echo $num|cut –c 2 ‘
if [ $c –eq 0 ]
then
exit
fi
else
c = ’ echo $num|cut –c $ct ‘
case $c in
s= ‘Zero’ ;;
s= ‘One’ ;;
s= ‘Two’ ;;
s= ‘Three’ ;;
s= ‘Four’ ;;
s= ‘Five’ ;;
s= ‘Six’ ;;
s= ‘Seven’ ;;
s= ‘Eight’ ;;
s= ‘Nine’ ;;
esac
fi
p = 1
I = ‘expr $i + 1’
done
if [ $ct –eq 2 ]
then
z = ‘echo $1 $s’
echo $z
else
echo $s
fi
OUTPUT
Enter a number: 75
Seventy Five
-:PROGRAM TO PRINT THE FIBONACCI SERIES:-
SOURCE CODE
echo Mention the range that you want to see
read n
i=1
s=1
l=0
while[ $i –le $n]
do
if [ $i –eq 1]
then
echo 0
Conclusion
One of the file is Numsummul
-:PROGRAM TO SHOW THE CONTENTS OF A FILE IF IT IS READABLE:-
SOURCE CODE
echo Enter a filename:
read file
if[-r $file]
then
echo The content of the file is –
cat $file
else
echo The file has no read permission.
fi
OUTPUT
Enter a filename: exiefiles
The file has no read permission.
Enter a filename: exefiles
The content of the file is –
for i in `ls`
do
if[-x $i]
then
echo One of the file is $i
fi
done
-:PROGRAM TO COUNT THE WRITABLE FILES OF A PWD:-
SOURCE CODE
for i in `ls`
do
if[-w $i]
then
ct= `expr $ct + 1`
fi
done
echo The numbers of write permitted files are $ct
OUTPUT
The numbers of write permitted files are 6
-:PROGRAM TO READ A FILENAME AND SHOW THE CONTENTS OF A READABLE FILE IF THE NAME IS OF A DIRECTORY FILE OR SHOW THE CONTENTS IF IT IS A NORMAL FILE OTHERWISE IF IT IS A BLOCK SPECIAL OR CHARACTER SPECIAL FILE THEN SHOW THAT IT IS A SPECIAL FILE:-
SOURCE CODE
echo Enter a filename:
read file
if[-d $file]
then
m=1
elif[-f $file]
then
m=2
else
m=3
fi
case $m in
- Cd $file
for I in `ls`
do
if[-r $i]
then
echo $i
fi
done
cd
;;
- Cat $file
mv $file Newone
;;
- Echo The file is a special file::
esac
OUTPUT
Enter a filename: writable.sh
for i in `ls`
do
if[-w $i]
then
ct= `expr $ct + 1`
fi
done
echo The numbers of write permitted files are $ct
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