字符串中统计单词个数

#include "stdafx.h"
#include <string.h>
#include <algorithm>
#include <vector>
#include <deque>
#include <functional>
#include <iostream>
#include <list>
#include <sstream>
#include <iterator>
#include <functional>

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{

stringstream ss;
string str = "the quick red fox jumps over the slow red turtle";
string strWord;
vector<string> vecWords;

ss.clear();
ss.str(str);
while (ss >> strWord)
{
vecWords.push_back(strWord);
strWord.clear();
}

cout << "sort before:" << endl;
copy(vecWords.begin(), vecWords.end(), ostream_iterator<string>(cout, " "));
cout << endl;

cout << "sort after and unique before:" << endl;

//从大到小排序
//sort(vecWords.begin(), vecWords.end(),greater<string>());
//默认是从小大的字典排序
sort(vecWords.begin(), vecWords.end());
copy(vecWords.begin(), vecWords.end(), ostream_iterator<string>(cout, " "));
cout << endl;

vector<string> vecWordsBackup(vecWords);

cout << "sort and unique afer:" << endl;
unique(vecWords.begin(),vecWords.end());
copy(vecWords.begin(), vecWords.end(), ostream_iterator<string>(cout, " "));
cout << endl;

cout << "sort and unique and erase after:" << endl;
vecWordsBackup.erase(unique(vecWordsBackup.begin(),vecWordsBackup.end()), vecWordsBackup.end());
copy(vecWordsBackup.begin(), vecWordsBackup.end(), ostream_iterator<string>(cout, " "));
cout << endl;

cout << "total words:"<<vecWordsBackup.size() <<endl;

return 0;
}