text: #ifndef PREADFILE_h_
  #define PREADFILE_h_
  
  #include <string>
  #include <iostream>
  #include <fstream>
  #include <vector>
  #include <sstream>
  using std::string;
  using std::vector;
  using std::ifstream;
  using std::istringstream;
  
  vector<string> readfile_lines(string filename);
  string readfile_string(string filename);
  vector<string> readfile_words(string filename);
  vector<string> split_by_spaces(string text);
  vector<string> get_true_word(int start,string text,int textnum,char endflag,int *p);
  vector<string> StringSplitbyChar(const string& s, char delimiter);
  
  #endif
  