统计输入的单词中有几个长度大于n的，n是自己指定的，用函数对象实现-白红宇

统计输入的单词中有几个长度大于n的，n是自己指定的，用函数对象实现

阅读量：5916 次

发布时间：2019-06-19

本文共 1519 字，大约阅读时间需要 5 分钟。

#ifndef COUNT_WORD_H#define COUNT_WORD_H #include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          class GT_cls{    public:        GT_cls(size_t val = 0)            :bound_(val){}        bool operator()(const std::string &s){            return s.size() >= bound_;        }    private:        std::string::size_type bound_;};class Word_count{    public:        Word_count(size_t val)            :GT_(val), wc_(0){}        void readWord();        void process();        void display();    private:        static bool isShorter(const std::string &s1, const std::string &s2);        std::vector
          
            words_; GT_cls GT_; size_t wc_;};inline void Word_count::readWord(){ std::istream_iterator
           
             cin_it(std::cin); std::istream_iterator
            
              end_of_stream; while(cin_it != end_of_stream){ words_.push_back(*cin_it++); }}inline void Word_count::process(){ sort(words_.begin(), words_.end()); std::vector
             
              ::iterator end_unique = \ unique(words_.begin(), words_.end()); words_.erase(end_unique, words_.end()); stable_sort(words_.begin(), words_.end(), isShorter); wc_ = count_if(words_.begin(), words_.end(), GT_);}inline void Word_count::display(){ std::cout << "There are " << wc_ << " words." << std::endl; for(std::vector
              
               ::iterator it = words_.begin(); it != words_.end(); ++it){ std::cout << *it << " "; } std::cout << std::endl;}inline bool Word_count::isShorter(const std::string &s1, const std::string &s2){ return s1.size() < s2.size();}#endif /*COUNT_WORD_H*/