COMP2004 Programming Practice
2002 Summer School

Week 6 Monday Tutorial Exercises

  1. Rewrite the join() function from Question 6 of the Week 1 Friday tutorial so that it uses the ostrstream and/or ostringstream classes.

  2. The application of the istrstream or istringstream classes to Assignment 3 should be obvious.

  3. As promised in today's lecture, here are the rewrites of the hard-to-read code examples from the Bidirectional Iterator section of today's lecture. Hopefully these are easier to understand, though you might find drawing pictures of arrays/vectors make understanding how they work easier. 
    template <typename BI, typename OI>
OI reverse_copy(BI begin, BI end, OI out) {
	while (begin != end) {
		end--;
		*out = *end;
		out++;
	}
	return out;
}

    template <typename BI>
void reverse(BI begin, BI end) {
	while (true) {
		if (begin == end) break;
		end--;
		if (begin == end) break;
		swap(*begin, *end);
		begin++;
	}
}