sed related query

Shell Programming and Scripting
1

Hi

I have a file which looks like this

//string = "abcd"; //info
//string = "*pqrs"; //add
string = "#123"; //sub
//string = "#1234567890"
data = check(string)
//string = "#1234567890"

I want to modify this as

string = "#987"; //mult
data = check(string)

How do i do that?

2

Where did this string
string = "#987"; //mult
come from ?

If you are looking to remove commented lines...

sed -e "/^ *\/\//d" file