question()
{
num=`ps -e | grep ps | awk -F" " '{print $1}'` 
qno=`expr $num % 10`
grade=grade1 
cat grade1/$qno
answer ${grade} ${qno} 
}
answer()
{
grade=$1
qno=$2
ansno=`wc -l $grade/ans/$qno | cut -d' ' -f1`
j=0 
while [ $j -lt $ansno ]
do
echo select your answer 
read ans[$j]

echo "do you want to select one more answer?"
read ch
if [ $ch != y ]
then
break;
fi
j=`expr $j + 1`
done
k=0 
exec < $grade/ans/$qno
while read line
do
echo line=$line 
while [ $k -lt $ansno ]
do
if [ ${ans[$k]} = $line ]
then
echo "equal"
else
echo "not equal"
fi
k=`expr $k + 1`
done 
done 
}