Add house boat multiple inheritance example

Author: XuhuaHuang

MultipleInheritance/CMakeLists.txt

@@ -10,3 +10,4 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 add_executable(date_time "date_time.cpp")
 add_executable(coloured_circle "coloured_circle.cpp")
 add_executable(modern_coloured_circle "modern_coloured_circle.cpp")
+add_executable(house_boat "house_boat.cpp")

MultipleInheritance/house_boat.cpp

@@ -0,0 +1,57 @@
+#include <iostream>
+
+class house_t {
+protected:
+  int residents{0};
+
+public:
+  house_t() = default;
+
+  explicit house_t(int num)
+    : residents(num) {}
+
+  void set_residents(int num) noexcept { residents = num; }
+
+  [[nodiscard]]
+  int get_residents() const noexcept {
+    return residents;
+  }
+};
+
+class boat_t {
+protected:
+  float max_speed{0.0f};
+
+public:
+  boat_t() = default;
+
+  explicit boat_t(float speed)
+    : max_speed(speed) {}
+
+  void set_max_speed(float speed) noexcept { max_speed = speed; }
+
+  [[nodiscard]]
+  float get_max_speed() const noexcept {
+    return max_speed;
+  }
+};
+
+class house_boat_t : public house_t, public boat_t {
+public:
+  house_boat_t() = default;
+
+  house_boat_t(int residents, float speed)
+    : house_t(residents)
+    , boat_t(speed) {}
+};
+
+int main() {
+  house_boat_t hb;
+  hb.set_residents(4);
+  hb.set_max_speed(10.0f);
+
+  std::cout << "This dwelling has " << hb.get_residents() << " residents and a max speed of " << hb.get_max_speed()
+            << std::endl;
+
+  return 0;
+}