/// fichier h
const StringContent& operator+(const StringContent& s);
/// fichier cpp
const StringContent& StringContent::operator+(const StringContent& s)
{
	std::cout << "operator+" << std::endl;
	int new_size = this->size() + s.size();
	char new_tab[new_size];
	strncpy(new_tab,this->_tab, this->size());
	strncpy(&(new_tab[this->size()]),s._tab, s.size());
	std::cout << "new_tab complet = " << new_tab << std::endl;
	StringContent *nouveau = new StringContent(new_tab);
	return(*nouveau);
}