text: #pragma once
  #include <fstream>
  
  bool exist(const std::string &name);
  
  void readInt(std::fstream &stream, int &t);
  
  void readString(std::fstream &stream, std::string &s, int _size = 40);
  
  void writeInt(std::fstream &stream, int t);
  
  void writeString(std::fstream &stream, std::string &s, int _size = 40);
  
  void writeDouble(std::fstream &stream, double t);
  
  double readDouble(std::fstream &stream);
  