Pair and tuple

- [Bill] Pairs and tuples…are useful in places…where you want to carry multiple, strongly typed values.…In many cases, a pair or a tuple…can be more convenient than a struct.…Here, I have a working copy of pair.cpp…from chapter two of the exercise files.…The pair type is in the utility header.…It's a small and simple type…that's useful for carrying a pair of strongly typed values.…There are several constructors available for pair,…and we can scroll down here…and we can see the pair being constructed…with an initializer list,…which is available, of course, beginning in C++11.…

A pair being instructed with a default constructor…and the values being passed directly,…and a pair being constructed with make_pair,…and there's also comparison operators available.…When I build and run this,…you'll see we have our initialized pairs…and we have the comparison operator results.…The comparison operator…does compare both values of the pair,…but it gives priority to the first value.…So, if the first values create…a comparison that's not equal,…