0
perfect code:
create ()
{
echo "Enter the filename which you want to create"
read db
touch $db
echo "File created"
}
insert()
{
if [ -z $db ];then
echo "Database doesnt exist. Create a new database."
else
echo "Enter the number of records to be added."
read no
while [ $no -gt 0 ]
do
echo "Enter roll no: "
read rno
srno=`grep "^$rno" "$db"`
if [ -z $srno ]
then
echo "Enter Name: "
read name
echo "Subject 1: "
read sub1
echo "Subject 2: "
read sub2
echo "Subject 3: "
read sub3
avg=$((($sub1+$sub2+$sub3)/3))
echo "Average : $avg"
record=$rno":"$name":"$sub1":"$sub2":"$sub3":"$avg
echo $record >> "$db"
no=$(($no-1))
else
echo "Record already exists."
fi
done
fi
}
search()
{
echo " Enter roll no: "
read rno
record=`grep "^$rno" "$db"`
if [ $? -ne 0 ]; then
echo "Record doesnt exist. "
else
echo "Record found"
echo $record
fi
}
modify()
{
echo " Enter roll no to modify: "
read rno
grep "^$rno" $db > temp1.txt
grep -v "^$rno" $db > temp2.txt
mv temp2.txt $db
if [ $? -ne 0 ]; then
echo "Record doesnt exist. "
else
name=`cut -d ";" -f2 "temp1.txt"`
sub1=`cut -d ";" -f3 "temp1.txt"`
sub2=`cut -d ";" -f4 "temp1.txt"`
sub3=`cut -d ";" -f5 "temp1.txt"`
echo "Enter the value you want to modify"
MENU=" Values
1)Name
2)Subject 1 marks
3)Subject 2 marks
4)Subject 3 marks
"
echo "$MENU"
echo "Enter your choice"
read n1
case $n1 in
1)
echo "Enter the new name"
read name
;;
2)
echo "Enter the new marks for subject 1"
read sub1
;;
3)
echo "Enter the new marks for subject 2"
read sub2
;;
4)
echo "Enter the new marks for subject 3"
read sub3
;;
*)
echo "Enter a vaid choice"
;;
esac
avg=$((($sub1+$sub2+$sub3)/3))
record=$rno";"$name";"$sub1";"$sub2";"$sub3";"$avg
echo $record >> "$db"
fi
}
delete()
{
echo " Enter roll no: "
read rno
record=`grep "^$rno" "$db"`
if [ $? -ne 0 ]; then
echo "Record doesnt exist. "
else
echo "Record found"
echo $record
record=`grep -v "^$rno" "$db" > tmp.txt`
mv tmp.txt $db
echo "Record deleted."
fi
}
display()
{
echo " Complete database..."
cat $db
}
MENU1="***********Menu***********
1)Create
2)Insert
3)Search
4)Modify
5)Delete
6)Display
7)Exit
"
while true
do
echo $MENU1
echo "Enter the choice: "
read n
case $n in
1) create
;;
2)insert
;;
3) search
;;
4) modify
;;
5) delete
;;
6) display
;;
7) exit
;;
esac
done
#written by:Fabianski Benjamin
What else can I help you with?
Write a shell script to show that user is logged in or not?
You don't need a shell script for that; use either 'whoami' or 'id'
How do you write a shell script which counts the last 10 lines present in a given file?
You don't need a shell script to do this - just use the 'tail' command.
When might it be necessary or advisable to write a shell script instead of a shell function?
A shell function will do nothing unless it is explicitly called by other code, typically in a shell script. A shell script is a runnable, executable process, which can call other shell scripts and/or functions. The question might be worded backwards - it is necessary to write shell functions for shell scripts when certain logical functionality is required to be performed multiple times. Consider a shell function equivalent to a program subroutine - they operate the same way.
How do you add two matrices using Linux shell script?
write ashell script to add awo matrix using array.
How do you write a shell script to enlist the processes being run?
#!/bin/sh PS -a
Is there a way to populate a database with another website's products without having to copy and paste the name of each product into the database?
If you have access to the other website's database you can just make a query there and write a script that then updates your own database with the received values.If you don't, writing a script would most likely be more work than doing it by yourself. You could maybe save some time by getting a list of the product names and then write a script that seperates the names and then writes the values into your database.
How do you write a statement in DOS using shell script to display a word?
We can not perform Shell Scripting in DOS, we can do Batch programing in DOS..
How do you write a script which lists the 10 Shell System variables?
You don't need a shell script to do that. Since you don't say what 10 shell variables you want, you can list them all by using the 'set' command to list all known in-use shell variables in the current session.
Write a shell script that counts a number of unique word contained in the alphabetical order line by line?
use python, shell is stupid
Write a shell script to count the number of times is appears in a given text file?
You don't need a shell script to do this; use the 'grep' command with the '-c' option to count the number of occurrences of some pattern.
Write a program in shell script to display odd number from 0 to 100?
seq 1 2 99
Write a shell script rename all files whose names end with .c as .old?
for i in *.cdomv $i $i.olddone
