STL begin() 1

badbegin1.cpp

std::vector<int> foo;

// Set the iterator once we've created the container
std::vector<int>::iterator iter = foo.begin(); 

// Add some stuff to it
foo.push_back(2);
foo.push_back(3);  

// Use the iterator... oops!
while (iter != foo.end()) {
  std::cerr << *iter << "\n";
  ++iter;
}