c++ lambda表达式

lambda表达式是C++ 11的新特性，其中一个非常重要特性是传递函数，这个函数可以参考注释，有一个字符串vector,利用很多algorithm里面的算法进行计算。

void biggies(vector<string> &words, vector<string>::size_type sz) {        elimDups(words);    // put words in alphabetical order and remove dupplicates        // sort words by size, but maintain alphabetical order for words of the same size        stable_sort(words.begin(), words.end(),                [](const string &a, const string &b)        {return a.size() < b.size();});        // get an iterator to the first element whose size() is >= sz        auto wc = find_if(words.begin(), words.end(),                [sz](const string &a)        {return a.size() >= sz;});        // compute the number of elements with size >= sz        auto count = words.end() - wc;        cout << count << " " << make_plural(count, "word", "s")                << " of length " << sz << " or longer" << endl;        // print words of the given size or longer, each one followed by a space        for_each(wc, words.end(),                [] const string &s){cout << s << " ";});        cout << endl;    }