linux - sed with special characters

Question

I have this line that I want to use sed on:

--> ASD = $start ( *.cpp ) <--

where $start is not a varaiable, I want to use sed on it and replace all this line with:

ASD = $dsadad ( .cpp ) 

How can I make sed ignore special charactars, I tried adding back slash before special characters, but maybe I got it wrong, can some one show me an example?

Here is what i want :

sed 's/CPPS = $(shell ls | grep *.cpp )/somereplace/' Makefile

Answer 1

sed 's/$start/$dsadad/g' your_file
>> ASD = $dsadad ( *.cpp ) 

sed 's/*//g' your_file
>> ASD = $start ( .cpp ) 

To follow your edit :

sed -i 's/ASD = $start ( *.cpp )/ASD = $dsadad ( .cpp )/' somefile
>> ASD = $dsadad ( .cpp )

Add the -i (--inplace) to edit the input file.