One Minute Evaluations for 10-12 February

CS 509 - Advanced Programming II

• Topic: Assignment 1, exceptions, iterators.

• Topic: STL iterators, exceptions, different ways to use exceptions.

• Topic: Exceptions and other error handling mechanisms, iterators.

• Topic: Vectors, exceptions, iterators.

  Question: Why doesn't this code work?
  vector <ofstream> vout ; ofstream test("blah") ; vout.push_back(test).

  One minute response: Because it doesn't make sense to make a copy of an open file stream, the file-stream copy constructor is private. As was mentioned in class, containers make copies of everything all the time, which means the container element type must support a public copy constructor. If you really want to do something like this, you can use pointers:

  vector <ofstream *> vout ; vout.push_back(new ofstream("blah"))

  but, of course, you're just begging for trouble if you do that.

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