Shell script to automatically evaluate the c program output

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We have organised one programming contest in our office. Where, we have given three (3) C proramme to each contestants. They need to submit their written with my script (Which is below). This script takes two command lines input, first is C file and second one is problem number (1,2 and 3). This script compile their code, generate ouput file and check it on some test cases. If users get 'Y' for all test cases, their programme is correct. Otherwise they get 'X'.

#!/bin/bash
if [ $# -gt 2 ]
then
echo "Too many Parameters! Please give filename only"
else
user=`whoami`
gcc $1 -o sample.out
a=1
echo "$1" >> "$user"
b=`ls /home/aashu/online_exam/ |grep input"$2" | wc -l`

while [ $a -le $b ]
do
./sample.out < /home/aashu/online_exam/"input$2$a.txt" >"output$2$a"
diff "output$2$a" /home/aashu/online_exam/"sample$2$a" >/dev/null
if [ $? -eq 0 ]
then
echo "Y"
echo "Y" >> "$user"
else
echo "X"
echo "X" >> "$user"
fi
a=`expr $a + 1`
sleep 1
done

echo "--------------" >> "$user"

if [ -d "/home/aashu/online_exam/submission/$user" ]
then
echo "Directory /path/to/dir exists."> /dev/null
else
echo "Error: Directory /path/to/dir does not exists."> /dev/null
mkdir /home/aashu/online_exam/submission/"$user" >/dev/null
fi
c=`ls /home/aashu/online_exam/submission/"$user"/ | grep $1 |wc -l`
cp $1 /home/aashu/online_exam/submission/"$user"/$c$1
cp "$user" /home/aashu/online_exam/submission/"$user"/"$user"

fi

Happy Coding

Shell script to automatically evaluate the c program output

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