text: #ifndef OPERATION_H
  #define OPERATION_H
  
  #include <string>
  
  
  class Operation {
  public:
      Operation() = default;
  
  
      virtual bool logInput() = 0;
      virtual bool logOutput() = 0;
      virtual bool errorCheck(std::string *errorMessage) = 0;
  
  };
  
  #endif // OPERATION_H
  