jemand ne Idee wo hier der Fehler liegt? Ich such schon die ganze Zeit.
main.cpp

#include <iostream>
#include <string>
#include "bullet.hpp"
using namespace std;

int main()
{

    string mystr("Hallo");
    int i(10);
    bullet mybullet(mystr, i);
    cout << mybullet << endl;
    return 0;

}

bullet.cpp

#include "bullet.hpp"

std::ostream& operator<<(std::ostream out, const bullet& b)
{
    out << b.val;
    return out;
}

bullet.hpp

#ifndef BULLET_HPP
#define BULLET_HPP
#include <string>
#include <iostream>

class bullet
{
public:
    friend std::ostream& operator<<(std::ostream out, const bullet& b);
    bullet(): val(0) {}
    bullet(const std::string& s, const int& i): str(s), val(i) {}

private:

    int val;
    std::string str;
};

#endif // BULLET_HPP

Ich bekomm da 2 compilerfehler:
1.

/usr/include/c++/4.7/bits/ios_base.h:788: error: 'std::ios_base::ios_base(const std::ios_base&)' is private

/usr/include/c++/4.7/bits/basic_ios.h:64: error: within this context

Übrigens. Wenn man "cout << mybullet << endl;" in main auskommentiert compiliert es.
Gruß

std::ostream& operator<<(std::ostream& out, const bullet& b);