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When you declaredisplay() in the derived class, it hides the base class display() instead of overloading it. So when you call the display() using a derived class object, you will get an error since...

Do you need to keep track of the line word counts until end of processing, or just can you just output them as you go?

If it's the latter then you only need to maintain your linked list while...

When I try the code suggested by vidyadhar85, pamu, Yoda, and anand.shah, I don't end up with anything that looks close to the output requested:
svn export ...

/source/ is too unprecise and risky.
$1~/source/ is okay, and $1=="source" is precise.

Or perhaps this?
sed -n 's|cfg/config/|./non_Profile/app|p' file

--

Actually all this confusion could have been avoided if proper code tags...

This should fix it.
awk '{$1=$1} /^source/{sub("cfg/config","./non_Profile/app",$0);print}'

You can also remove the ^
awk '/source/{sub("cfg/config","./non_Profile/app",$0);print}'

"`" won't work here....

try

find . -name amp.cfg | cut -c 3- | sed 's/\/amp.cfg$//'

It does not require any change to run in a shell script, just copy paste the sed or awk lines into a file and run. But remember to give full path name of the inputfile, its better coding.
$ cat...

echo ' /LDCA20/rel/prod/libina.a'|sed '/libina\.a$/s///'
/LDCA20/rel/prod/

The awk command searches for a record whose first field ($1) matches the variable value supplied (variable what containing ProdId_A). For each such record, the split function is used to get, e.g.,...

prod='ProdId_A';
awk -F, -v what="$prod" '$1==what{split($5,b,"_");a=$2 FS b[2]}END{print a}' file