c++primer 容器算法整理一

#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main()
{
string line1="We were her pride of 10 she named us:";

string line2="benjamin,phoenix,the prodigal";
string line3="and perspicacious pacific Suzanne";
    string sentence=line1+' '+line2+' '+line3;
string separators(" \t:,\v\r\n\f");
string word;
string::size_type maxlen,minlen,wordlen,count=0;
vector<string> longestWords,shortestWords;
string::size_type startPos=0,endPos=0;
while((startPos=sentence.find_first_not_of(separators,endPos))!=string::npos)
{
   ++count;
   endPos=sentence.find_first_of(separators,startPos);
    if(endPos==string::npos)
    {
     wordlen=sentence.size()-startPos;
    }
    else
    {
     wordlen=endPos-startPos;
    }
    word.assign(sentence.begin()+startPos,sentence.begin()+startPos+wordlen);
    startPos=sentence.find_first_not_of(separators,endPos);
    if(count==1)
    { maxlen=minlen=wordlen;
       longestWords.push_back(word);
     shortestWords.push_back(word);
    }
    else
    {
     if(wordlen>maxlen)
     {
      maxlen=wordlen;
      longestWords.clear();
      longestWords.push_back(word);
     }
     else if(wordlen==maxlen)
      longestWords.push_back(word);
    
     if(wordlen<minlen)
     {
      minlen=wordlen;
      shortestWords.clear();
      shortestWords.push_back(word);
     }
     else if(wordlen==minlen)
    
      shortestWords.push_back(word);
    }
}
     cout<<"word amount "<<count<<endl;
     vector<string>::iterator iter;
     cout<<"longest word(s):"<<endl;
     iter=longestWords.begin();
      while(iter!=longestWords.end())
      cout<<*iter++<<endl;
   
     cout<<"shortest word(s):"<<endl;
     iter=shortestWords.begin();
     while(iter!=shortestWords.end())
     cout<<*iter++<<endl;
    
   
     return 0;

}