// Listing 2: Move-Semantik

std::cout << "move semantic for vector: " << std::endl;
std::vector <int> vec1={1,2,3,4,5,6,7,8,9};
std::vector <int> vec2;
std::cout << "vec1.size(): " << vec1.size() <<  " vec2.size(): " << vec2.size() << std::endl;
vec2= std::move(vec1);
std::cout << "vec1.size(): " << vec1.size() <<  " vec2.size(): " << vec2.size() << "\n\n";
std::cout <<"copy semantic for vector: " << std::endl;
std::vector <int> vec3;
std::cout << "vec2.size(): " << vec2.size() <<  " vec3.size(): " << vec3.size() << std::endl;
vec3= vec2;
std::cout << "vec2.size(): " << vec2.size() <<  " vec3.size(): " << vec3.size() << std::endl;