multisetwordcount.cpp

来自「This is the second part of that lab manu」· C++ 代码 · 共 35 行

//: C07:MultiSetWordCount.cpp
// From "Thinking in C++, 2nd Edition, Volume 2"
// by Bruce Eckel & Chuck Allison, (c) 2001 MindView, Inc.
// Available at www.BruceEckel.com.
//{L} StreamTokenizer ../TestSuite/Test
//{-g++295}
// Count occurrences of words using a multiset
#include "StreamTokenizer.h"
#include "../require.h"
#include <string>
#include <set>
#include <fstream>
#include <iterator>
using namespace std;

int main(int argc, char* argv[]) {
  char* fname = "MultiSetWordCount.cpp";
  if(argc > 1) fname = argv[1];
  ifstream in(fname);
  assure(in, fname);
  StreamTokenizer words(in);
  multiset<string> wordmset;
  string word;
  while((word = words.next()).size() != 0)
    wordmset.insert(word);
  typedef multiset<string>::iterator MSit;
  MSit it = wordmset.begin();
  while(it != wordmset.end()) {
    pair<MSit, MSit> p=wordmset.equal_range(*it);
    int count = distance(p.first, p.second);
    cout << *it << ": " << count << endl;
    it = p.second; // Move to the next word
  }
} ///:~