Remove prefix of each line in a file and output to another file using sed

Question

I have a source code file in which comments are prefixed with // (ie. double slashes and an empty space), I want to convert the source code into a document so I tried to cat file.c and pipe it to sed, the thinking is to replace "double slash and a space" if a line starts with it, with empty string, but it looks like the slash has some special meaning in sed, so what's the best way of constructing the sed arguments?

Thanks!

Answer 1

The slash only has meaning if you allow it.

sed 's#^// +##' < file.c

Answer 2

If you want to remove the special meaning of / from sed then following may help you in same.

sed 's/^\/\/ //g'  Input_file

So I am escaping / here by using \ before it, so it will be taken as a literal character rather than it's special meaning in code. Also if you are happy with above command's result then use -i to save the changes in Input_file itself. Hope this helps.