Why does // in a string does not start a comment in C++?

Question

I am printing a line like this

cout<<"Hello //stackoverflow";

And this produces the following output

Hello //stackoverflow

I want to know why it does not give me an error as I commented half of the statement and there should be

missing terminating " character

error.

Answer 1

The grammar of C++ (like most of programming languages) is context-sensitive. Simply, // does not start a comment if it is within a string literal.