text: #pragma once
  
  class CharTypes
  {
  private:
  	const std::string nums = "0123456789.";
  	const std::string opers = "+-*/^";
  	const std::string brackets = "()";
  	const std::string variables = "xyz";
  
  	std::map<std::string, int> possiblePriors;
  
  public:
  	CharTypes();
  
  	bool IsNumber(std::string);
  	bool IsOperator(std::string);
  	bool IsBrackets(std::string);
  	bool IsVariable(std::string);
  
  	int ReturnPriority(std::string);
  };
  
  