Dean Leibner Day3

exercise/01/animal.cpp

@@ -0,0 +1,63 @@
+#include "animal.h"
+
+unsigned int insect::legs() const
+{
+  return 6u;
+}
+
+std::wstring cockroach::species() const
+{
+  return L"cockroach";
+}
+
+unsigned bird::legs() const
+{
+  return 2u;
+}
+
+std::wstring sparrow::species() const
+{
+  return L"sparrow";
+}
+
+unsigned int spider::legs() const
+{
+  return 8u;
+}
+
+std::wstring tarantula::species() const
+{
+  return L"tarantula";
+}
+
+std::unique_ptr<animal> animal_factory(const int id)
+{
+  switch (id)
+  {
+  case cockroachId:
+    return std::make_unique<cockroach>();
+  case sparrowId:
+    return std::make_unique<sparrow>();
+  case tarantulaId:
+    return std::make_unique<tarantula>();
+  default:
+    throw std::invalid_argument("Animal with id " + std::to_string(id) + " doesn't exist!");
+  }
+}
+
+leg_counter::leg_counter() : legCount(0)
+{
+}
+
+unsigned int leg_counter::legs() const
+{
+  return legCount;
+}
+
+std::wstring leg_counter::add_animal(const std::unique_ptr<animal> animal)
+{
+  legCount += animal->legs();
+
+  return animal->species();
+}
+

exercise/01/animal.h

@@ -0,0 +1,66 @@
+#pragma once
+#include <string>
+
+class animal
+{
+public:
+  virtual ~animal() = default;
+  virtual std::wstring species() const = 0;
+  virtual unsigned int legs() const = 0;
+};
+
+class insect : public animal
+{
+public:
+  unsigned int legs() const override;
+};
+
+class cockroach : public insect
+{
+public:
+  std::wstring species() const override;
+};
+
+class bird : public animal
+{
+public:
+  unsigned int legs() const override;
+};
+
+class sparrow : public bird
+{
+public:
+  std::wstring species() const override;
+};
+
+class spider : public animal
+{
+public:
+  unsigned int legs() const override;
+};
+
+class tarantula : public spider
+{
+public:
+  std::wstring species() const override;
+};
+
+class leg_counter
+{
+public:
+  leg_counter();
+  std::wstring add_animal(std::unique_ptr<animal>);
+  unsigned int legs() const;
+
+private:
+  unsigned int legCount;
+};
+
+std::unique_ptr<animal> animal_factory(int id);
+
+enum AnimalIds
+{
+  cockroachId = 1,
+  sparrowId = 2,
+  tarantulaId = 3
+};