C++ Function Parameter Creating Temporary Instances with Functional Constructors

#include <iostream>
#include <string>

using namespace std;

void WriteMe(string str)
{
    cout << "Here I am: " << str << endl;
}

int main()/* w ww .  j  a  va 2 s  .co m*/
{
    WriteMe(string("Sam"));
    return 0;
}