2nd/10_Wiki/Dev/Topic_CPP/CPP_Polymorphism.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-polymorphism	C++ Polymorphism	Programming_Language	draft	conceptual		method overriding many forms C++ 다형성		B	0.86	2026-07-04	2026-07-04			cpp programming-language w3schools oop polymorphism	https://www.w3schools.com/cpp/cpp_polymorphism.asp

CPP Polymorphism

🎯 한 줄 통찰 (One-line insight)

Polymorphism is explicitly framed as Inheritance's NATURAL EXTENSION, not a separate feature — the source states "Inheritance lets us inherit... Polymorphism uses those methods to perform different tasks," meaning a Pig and Dog REDEFINING the SAME method name (animalSound()) inherited from Animal isn't a new syntax to learn, it's simply what happens when a derived class writes its own version of a method it already inherited by name. [S1]

🧠 핵심 개념 (Core concepts)

• Polymorphism — "many forms"; occurs when related classes (via inheritance) implement the SAME method name differently, so ONE action behaves differently per class. [S1]
• Method overriding — a derived class REDEFINES a method it inherited from the base class, with the SAME name and signature. [S1]
• Direct extension of inheritance — polymorphism doesn't add new syntax; it's just what happens when derived classes redefine an inherited method name. [S1]

📖 세부 내용 (Details)

• Three classes with the SAME method name, each behaving differently: class Animal { public: void animalSound() { cout << "The animal makes a sound \n"; } }; class Pig : public Animal { public: void animalSound() { cout << "The pig says: wee wee \n"; } }; class Dog : public Animal { public: void animalSound() { cout << "The dog says: bow wow \n"; } }; — calling .animalSound() on each object type produces its own class's version. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

🛠️ 적용 사례 (Applied in summary)

Animal 기반 클래스의 animalSound()를 Pig와 Dog가 각각 다르게 재정의하는 예제가 원문에서 직접 실전 활용 사례로 제시됨(동일한 행동, 클래스마다 다른 구현). [S1]

💻 코드 패턴 (Code patterns)

The same method name behaving differently across sibling derived classes (C++):

class Animal {
public:
  void animalSound() { cout << "The animal makes a sound \n"; }
};
class Pig : public Animal {
public:
  void animalSound() { cout << "The pig says: wee wee \n"; }
};
class Dog : public Animal {
public:
  void animalSound() { cout << "The dog says: bow wow \n"; }
};

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.86
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C++ Tutorial
• 관련 개념: CPP Inheritance Multiple, CPP Virtual Functions
• 참조 맥락: 다형성 — 가상 함수(Virtual Functions) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ Polymorphism — https://www.w3schools.com/cpp/cpp_polymorphism.asp

📝 변경 이력 (Change history)

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