>Another way to purge all those wobbly '\n' ...
That example is incompete, which is why cin.ignore is a superior alternative. It forces you to provide all of the requisite information whereas with the loop approach it's easy to miss a very important test for end-of-file. The correct loop would be:

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while (std::cin.get(ch) && ch != '\n')
  ;

while (std::cin.get(ch) && ch != '\n') ;

Or using the C-style alternative:

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while ((ch = std::cin.get()) != EOF && ch != '\n')
  ;

while ((ch = std::cin.get()) != EOF && ch != '\n') ;