text: 
  #include <iostream>
  #include <string>
  #include <iomanip>
  
  #include <stdlib.h>
  #include <stdio.h>
  
  class strxor
  {
  private:
      unsigned char ascii2int(int in);
      unsigned char getbytefrom_hexstr(std::string str, int pos);
  
  public:
      strxor();
      ~strxor();
      std::string hexstr2str(std::string in);
      std::string str2hexstr(std::string in);
      std::string xor_str(std::string a, std::string b);
  };
  