2nd/10_Wiki/Dev/Topic_CPP/CPP_Inheritance_Multilevel.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
cpp-inheritance-multilevel	C++ Multilevel Inheritance	Programming_Language	draft	conceptual		grandchild class chained inheritance C++ 다단계 상속		B	0.84	2026-07-04	2026-07-04			cpp programming-language w3schools oop inheritance	https://www.w3schools.com/cpp/cpp_inheritance_multilevel.asp

CPP Multilevel Inheritance

🎯 한 줄 통찰 (One-line insight)

MyGrandChild never mentions MyClass anywhere in its own declaration — it only inherits from MyChild, yet calling myFunction() (defined in MyClass) works perfectly, proving inheritance CHAINS transitively: a grandchild automatically gets everything its parent has, INCLUDING whatever the parent itself inherited, without needing to re-declare or re-reference the original ancestor at any point in the chain. [S1]

🧠 핵심 개념 (Core concepts)

• Multilevel inheritance — a class derived from ANOTHER derived class (a chain: grandparent → parent → child). [S1]
• Transitive inheritance — the grandchild class automatically has access to the ORIGINAL base class's members, even though it never directly references that base class. [S1]

📖 세부 내용 (Details)

• A three-level inheritance chain: class MyClass { public: void myFunction() { cout << "Some content in parent class."; } }; class MyChild: public MyClass { }; class MyGrandChild: public MyChild { }; MyGrandChild myObj; myObj.myFunction(); // works, inherited transitively through MyChild. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 상속은 전이적(transitive)으로 작동: 손자 클래스가 원래의 베이스 클래스를 전혀 언급하지 않아도, 부모를 거쳐 그 기능을 자동으로 물려받는다는 점이 직접 예제로 증명됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — MyClass → MyChild → MyGrandChild의 3단계 상속 체인이 다단계 상속의 개념적 골격을 보여준다. [S1]

💻 코드 패턴 (Code patterns)

A three-level inheritance chain — the grandchild inherits transitively (C++):

class MyClass { // grandparent
public:
  void myFunction() { cout << "Some content in parent class."; }
};
class MyChild: public MyClass { }; // parent
class MyGrandChild: public MyChild { }; // child
int main() {
  MyGrandChild myObj;
  myObj.myFunction(); // works via the full chain
  return 0;
}

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.84
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C++ Tutorial
• 관련 개념: CPP Inheritance Access, CPP Inheritance Multiple
• 참조 맥락: 다단계 상속 — 다중 상속(Inheritance Multiple) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ Multilevel Inheritance — https://www.w3schools.com/cpp/cpp_inheritance_multilevel.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "C++ Multilevel Inheritance" page (Astra wiki-curation, P-Reinforce v3.1 format).