Question

I have a simple question. I have a long std::string that I want to pass it to a function.
I wanna know that this string will be copy to stack then a copy of that will be passed or something like pointer will be passed and no additional space will be required?

(C++)

• I have another little question: How much memory does an element of a string take?Just like char?

Answer 1

Yes, it will be deep copied, so use const reference is recommended.

void fun(const std::string & arg)

Typically std::string has 2 fields, a pointer pointing to dynamic allocated memory and the length, so it is 16+actual length on 64bit machines.