UVa 10815

Andy’s First Dictionary.cpp

#include <algorithm>
#include <iostream>
#include <iterator>
#include <regex>
#include <set>
#include <stdio.h>
#include <string>

using namespace std;

int main()
{
	auto dictionary = set<string> {};
	auto pattern = regex("[a-zA-Z]+");

	string lineInArticle;
	while (getline(cin, lineInArticle))
	{
		transform(lineInArticle.begin(), lineInArticle.end(), lineInArticle.begin(), [](const char character) { return tolower(character); });
		copy(sregex_token_iterator(lineInArticle.begin(), lineInArticle.end(), pattern), sregex_token_iterator(),
			 inserter(dictionary, dictionary.begin()));
	}

	for (const auto &words: dictionary)
	{
		cout << words << endl;
	}

	return 0;
}