What does '\0' mean?

Question

I can\'t understand what the \'\\0\' in the two different place mean in the following code:

string x = \"hhhdef\\n\";
cout << x << endl;
x[3]=\'\         


        

Answer 1

\0 is the NULL character, you can find it in your ASCII table, it has the value 0.

It is used to determinate the end of C-style strings.

However, C++ class std::string stores its size as an integer, and thus does not rely on it.