week2 q4 and readme changes

week2/Readme.txt

-Members:
-Aditya Aditya
-Keshav Agarwal
-Mahesh
-Vishal Mishra
+Keshav - Q1
+Mahesh - Q2
+Aditya - Q3
+Vishal - Q4
+
\ No newline at end of file
+GIT: https://git.cse.iitb.ac.in/keshavagarwal/unagi/tree/master/week2
+
+References:
+https://www.tutorialspoint.com/unix/unix-special-variables.htm
+https://stackoverflow.com/questions/1975849/how-to-split-a-line-into-words-separated-by-one-or-more-spaces-in-bash
\ No newline at end of file

week2/q4/q4.sh

@@ -2,18 +2,19 @@
 sums=0
 counts=0
 arr=()
-sort q4_in.txt > tem.txt
+xargs -n1 < q4_in.txt | sort -n > tem.txt
 while read p
 do 
     arr[counts]=$p
     counts=`expr $counts + 1`
     sums=`expr $sums + $p`
 done < tem.txt
-echo `expr $sums / $counts`
+echo `echo "$sums / $counts" | bc -l`
 rem=$(( $counts % 2 ))
 if [ $rem -eq 0 ]
 then
-  echo "$(( ( arr[$(($counts/2))] + arr[$(($counts/2-1))] ) / 2 ))"
+	mid=$((arr[$(($counts/2))] + arr[$(($counts/2-1))]))
+  echo `echo "$mid / 2" |bc -l`
 else
   echo "${arr[$counts /2]}"
 fi