Accept roll number, name, marks in sub1, sub2 and sub3. Calculate total, percentage, grade & class and enter the record in a file “student”. The marks are out of 100 in each subject. Allow the user to enter any number of records.
Grade is found out as follows :
Percentage
Grade
< 35
Fail
>= 35 & < 50
Third
>= 50 & < 60
Second
>= 60 & < 75
First
>= 75
Distn
If the student secures < 35 in any one of the subjects, then class = “fail”. Otherwise class=”pass”.
Answer:
q=y
c=1
while [ $q = 'y' ]
do
echo "enter the name of student $c.. "
read name
echo "enter the roll no of student "
read roll
echo "enter the marks of three subjects out of 100”
read sub1 sub2 sub3
echo "records of $name having roll no. $roll are as follows... " >> student
echo "records of $name having roll no. $roll are as follows..."
if [ $sub1 -le 100 ] && [ $sub2 -le 100 ] && [ $sub3 -le 100 ] | bc
then
if [ $sub1 -lt 35 ] || [ $sub2 -lt 35 ] || [ $sub3 -lt 35 ]
then
class="fail"
echo "class is $class " >> student
echo "class is $class "
else
class=”pass”
echo "class is $class " >> student
echo "class is $class "
fi
tot=`expr $sub1 + $sub2 + $sub3`
echo "total is $tot " >> student
echo "total is $tot "
per=`expr $tot / 3`
echo "percentage is $per % " >>student
echo "percentage is $per % "
if [ $per -lt 35]
then
grade="fail"
echo "grade is $grade " >> student
echo "grade is $grade "
elif [ $per -ge 35 ] && [ $per -lt 50
then
grade="third"
echo " grade is $grade " >> student
echo " grade is $grade"
elif [ $per -gt 60 ] && [ $per -lt 75 ]
then
grade="first"
echo "grade is $grade " >> student
echo "grade is $grade "
else
grade="distn"
echo " grade is $grade " >> student
echo " grade is $grade "
fi
else
echo "incorrect data "
c=`expr $c - 1` #decrease one in the counter for the incorrect data
fi
echo " continue..[y/n].. "
read q
c=`expr $c + 1` #increase one in the counter
done
echo "bye bye.. "
