Add files

q4/q4.sh

 #! /bin/bash
 
-grep -f ./actual_output.txt ./generated_output.txt > tmp-marks
+grep -Fxf ./actual_output.txt ./generated_output.txt > tmp-marks
 marks=`wc -w tmp-marks | awk '{print $1}'`
 rm tmp-marks
 tot=`wc -w './actual_output.txt' | awk '{print $1}'`