How to Get Static Var Inside Class

Question

I am new for C++, I want to do some thing like the Java language below without create an object, how do I do that?

public class ClassA {
    **public static final NAME = "ClassA";**
}

public class Main {
    public static void main(String[] args) {
        System.out.println(**ClassA.NAME**);
    }
}

Answer 1

#include <iostream>
#include <string>

static const std::string NAME = "ClassA";

int main()
{
    std::cout << NAME;
}

Answer 2

C++98

class ClassA {
public:
    static const std::string Name;
};

const std::string ClassA::Name = "ClassA";

int main()
{
    std::cout << ClassA::Name << std::endl;
}

C++17

class ClassA {
public:
    static inline const std::string Name = "ClassA";
};

int main()
{
    std::cout << ClassA::Name << std::endl;
}

C++20

(cannot test it yet)

class ClassA {
public:
    static constexpr std::string Name = "ClassA";
}

int main()
{
    std::cout << ClassA::Name << std::endl;
}