interfaces.h

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#ifndef INCLUDE_GAME_MATH_INTERFACES_H
#define INCLUDE_GAME_MATH_INTERFACES_H
 
#include <memory>
#include <string>
 
namespace game::math {
 
    struct IEquation {
        virtual ~IEquation() = default;
 
        [[nodiscard]] virtual auto answer() const -> int = 0;
 
        [[nodiscard]] virtual auto display() const -> std::string = 0;
 
        [[nodiscard]] virtual auto display_solved() const -> std::string = 0;
    };
 
    struct IEquationFactory {
        virtual ~IEquationFactory() = default;
 
        [[nodiscard]] virtual auto create() -> std::unique_ptr<IEquation> = 0;
    };
}  // namespace game::math
 
#endif