#include <fstream>
#include <iostream>
#include <set>
#include <string>

using namespace std;

struct comparator {
  bool operator()(const string &a, const string &b) {
    if(a.length() == b.length())
      return a<b;
    return a.length()<b.length();
  }
};

int main()
{
  ifstream in("/usr/share/dict/words");
  set<string,comparator> sorter;
  string s;

  while(in >> s) if(tolower(s[0]) == 'q') sorter.insert(s);

  int max = 0;
  for(set<string,comparator>::iterator word = sorter.begin(); word != sorter.end(); ++word) {
    if(word->length() > max) {
      max = word->length();
      cout << "Words of length " << max << '\n';
    }
    cout << *word << " " << word->length() << "\n";
  }
  return 0;
}

http://steve.yegge.googlepages.com/ruby-tour

Stevey's sorting program in C++

C++