Question

Shell Programming

USA College wants you to create a simple application. The program will enter the student name, student id, Student Level, Enter the marks for four (4) courses. Calculate the total marks and the SGPA. If the SGPA less than 2.0 then students will enter into probation.display the appropriate output.

Answer 1

Check out the solution and let me know if you need any other info through COMMENTS.

________

#!/bin/sh   

# read the user input by printing appropriate messages
echo "Enter Student Name : "
read stud_name
echo "Enter Student ID : "
read stud_id
echo "Enter Student Level : "   
read stud_level   
echo "Enter marks of 4 courses : "
read marks[0]   
read marks[1]   
read marks[2]   
read marks[3]   
  
# sum of all 4 marks
sum=$(echo "${marks[0]} + ${marks[1]} + ${marks[2]} + ${marks[3]}"|bc)

# initialize required variables
i=0   
gradepoints=0   
# traverse through the marks of all 4 courses
# assuming credits of individual course is 4
while [ $i -lt 4 ]
do
   # if marks >= 90 then assume the credit is 4
if [ ${marks[i]} -ge 90 ]   
then
       # so multiply "gained credit * course credit"
gp1=$(echo "4 * 4"|bc)
   # if marks >= 70 AND marks < 90 then assume the credit is 3   
elif [ ${marks[i]} -ge 70 -a ${marks[i]} -lt 90 ]   
then
gp1=$(echo "3 * 4"|bc)
   # if marks >= 50 AND marks < 70 then assume the credit is 2
elif [ ${marks[i]} -ge 50 -a ${marks[i]} -lt 70 ]   
then
gp1=$(echo "2 * 4"|bc)
   # if marks >= 35 AND marks < 50 then assume the credit is 1
   elif [ ${marks[i]} -ge 35 -a ${marks[i]} -lt 50 ]   
then
gp1=$(echo "1 * 4"|bc)
   # if marks < 35 then credit = 0
else
gp1=$(echo "0 * 4"|bc)
fi
   # add all 'gp1' of 4 courses to get the gradepoints
gradepoints=$(echo "$gradepoints + $gp1"|bc)   
   # increment the initializer 'i' by 1   
i=$(( $i + 1))
done
# end of WHILE   
# finding the SGPA by dividing the gradepoints by total course credits (4+4+4+4 = 16)
SGPA=$(echo "$gradepoints / 16.0"|bc)   

# display the results as required
echo "Student Name : $stud_name"
echo "Student ID : $stud_id"
echo "Student Level : $stud_level"
echo "Total marks : $sum"   

# check out SGPA and print the message accordingly
if [ $SGPA -lt 2 ]
then
echo "SGPA : $SGPA"   
echo "Student enters to PROBATION"
else
echo "SGPA : $SGPA"   
echo "Congrats!!!!"   
fi
  
echo ""   
echo "Program terminated!!!"
------------------------------------------------------------