Does a const reference class member prolong the life of a temporary?

Question

Why does this:

#include 
#include 
using namespace std;

class Sandbox
{
public:
    Sandbox(const string& n) : member(n) {         


        

Answer 1

you're referring to something which has vanished. The following will work

#include 
#include 

class Sandbox
{

public:
    const string member = " "; //default to whatever is the requirement
    Sandbox(const string& n) : member(n) {}//a copy is made

};

int main()
{
    Sandbox sandbox(string("four"));
    std::cout << "The answer is: " << sandbox.member << std::endl;
    return 0;
}