exam19

#!/bin/bash
# Declaring all the variables
SUM=0
COUNT=0
MAX_MARKS=0
MIN_MARKS=100
MAX_MARKS_LIST=()
MIN_MARKS_LIST=()
FAIL_LIST=()
input="marks.csv"
# Set "," as the field limiter using $IFS
# and then read line by line using while and read
while IFS=',' read -r name marks
do
if [ $marks -gt $MAX_MARKS ]; then
MAX_MARKS=$marks
fi
if [ $marks -lt $MIN_MARKS ]; then
MIN_MARKS=$marks
fi
if [ $marks -lt 40  ]; then
FAIL_LIST+=($name )
fi
SUM=$(( SUM + marks))
COUNT=$(( COUNT + 1 ))
done < "$input"
input="marks.csv"
while IFS=',' read -r name marks
do
if [ $marks -eq $MAX_MARKS ]; then
MAX_MARKS_LIST+=($name)
fi
if [ $marks -eq $MIN_MARKS ]; then
MIN_MARKS_LIST+=($name)
fi
done < "$input"
echo "The highest marks obtained is:" $MAX_MARKS
echo
echo "The students who have obtained the highest marks are: " ${MAX_MARKS_LIST[@]}
echo
echo "The lowest marks obtained is:" $MIN_MARKS
echo
echo "The students who have obtained the lowest marks are:"  ${MIN_MARKS_LIST[@]}
echo
echo "The students who have failed are:" ${FAIL_LIST[@]}
echo
echo "The average marks obtained is:" $((SUM / COUNT))