text: #ifndef EXP_5_EQUATION_H
  #define EXP_5_EQUATION_H
  
  #include <cmath>
  
  class Equation {
  
  private:
      double a;
      double b;
      double c;
      bool is_solved;
      bool has_root;
      double root_a;
      double root_b;
  
  public:
      Equation();
  
      Equation(double a_, double b_, double c_);
  
      double get_a();
  
      void set_a(double a_);
  
      double get_b();
  
      void set_b(double b_);
  
      double get_c();
  
      void set_c(double c_);
  
      bool HasRoot();
  
      double get_root_a();
  
      double get_root_b();
  
  };
  
  
  #endif //EXP_5_EQUATION_H
  