text: //
  // Created by djnic on 18.11.2020.
  //
  
  #ifndef CLASS_TRAINIG_CALCULATOR_H
  #define CLASS_TRAINIG_CALCULATOR_H
  
  
  #include <string>
  #include "Value.h"
  
  class Calculator {
  public:
      virtual Value calculate(double firstVar, double secondVar, std::string sign) = 0;
  };
  
  
  #endif //CLASS_TRAINIG_CALCULATOR_H
  