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
Wiki User
∙ 11y ago
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