util/wordstat.cpp

   1 #include <map>
   2 #include <iostream>
   3 #include <string>
   4 #include <iomanip>
   5 #include <algorithm>
   6 #include <sstream>
   7 #include <cctype>
   8 #include <clocale>
   9 #include <cstdlib>
  10
  11 typedef std::map< std::string, unsigned > freq_type;
  12
  13 class print: public std::unary_function< freq_type::value_type, void >
  14 {
  15         std::ostream& os;
  16 public:
  17         unsigned total;
  18         unsigned total_chars;
  19         print(std::ostream& out, unsigned total, unsigned total_chars)
  20                 : os(out), total(total), total_chars(total_chars) {}
  21         void operator() (const freq_type::value_type& p)
  22         {
  23                 os.fill('0');
  24                 os.width(8);
  25                 os << p.second * (p.first.length()+2) << ": " << p.first << " ("
  26                         << double(p.second) * (p.first.length()+2) / total_chars * 100
  27                         << "% / " << double(p.second) / total * 100 << "%)\n";
  28         }
  29 };
  30
  31 int main(void)
  32 {
  33         std::setlocale(LC_ALL, "es_AR");
  34         std::string buf;
  35         unsigned total = 0, total_chars = 0;
  36         freq_type freq;
  37         while (std::cin >> buf) {
  38                 ++freq[buf];
  39                 ++total;
  40                 total_chars += buf.length();
  41         }
  42         for_each(freq.begin(), freq.end(), print(std::cout, total, total_chars));
  43         return 0;
  44 }
  45