How to end loop??

[hjone]

I need to prompt the user for a word, and repeat the prompt until the input given has no non-whitespace characters. How would I set up that loop?

[vlad from moscow]

std::string word;

do
{
	std::cout << "Enter a word: ";
	std::getline( std::cin, word );
} while ( word.empty() );

std::cout << word << std::endl;