Shell Programming and Scripting

okay,now i seem to have a problem with the search command which i used.

Code:

Code:

echo -n "Title:"
read Title  
echo -n "Author:"
read Author
price_check=`grep $Title fruit | grep $Author | awk -F":" '
if [ "$price_check"="$Author" ] ; then
  echo "book exist"
else
 echo " Book does not exist"
fi
{print $3}'

`

Code:

Code:

Persia:42:John      ---database
France:50:Mabel 
Persia:50:Rach
Germany:60:John

for example, the user is to input title as "Persia" and "Author" as John. i will then use grep to search for lines which contain the title, then pipe it into another grep command which will then search for author based on the row available, then after that print $3 which is the name of the author.

So if i were to type in "rrrr" for title and "aaaa" for author, the value of price_check="" right? as there is not such existing data inside.


but for some reason, when i did a check on it, it does not seem to work. when i input data which is not in the database, it still displays the message "book exist" instead of telling me "book does not exist". Could you tell me the reason why.

what are you doing??!!! you are mixing awk with shell commands together

Note:- you can't use echo or other shell command inside awk like you did in above

you need to read more tutorial about awk....

So how am i able to do a search with this two data to check if it is in the correct row?

---------- Post updated at 09:19 PM ---------- Previous update was at 08:46 PM ----------

Code:

echo -n "Title:"
read Title  
echo -n "Author:"
read Author
#awk -F":" '{print $1 }' fruit
awk  '{if ($1==$Title && $3==$Author) print $3 } ' fruit

i tried using this but nothing was printed. AM i using the if statement wrongly?

Code:

awk  -F: '{if ($1=='$Title' && $3=='$Author') print $3 } ' fruit

Code:

echo -n "Title:"
read Title  
echo -n "Author:"
read Author
price_check=`awk  -F: '{if ($1==$Title && $3==$Author) print $3 } ' fruit`
echo $price_check

it should at least have an output , but for some reason nothing is being displayed. i have tried putting "" around the $title and $Author , but it does not seem to work. When u tried running it, did it work for u?

Code:

note the '$Title' and '$Author'

@gregarion: You are not copying Ahmad's example properly. Look closely and you will discover 4 additional single quotes that you left out.