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10_Wiki/Topic_Programming/Topic_CPP/CPP_Polymorphism.md

@@ -0,0 +1,74 @@
+---
+id: cpp-polymorphism
+title: "C++ Polymorphism"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["method overriding", "many forms", "C++ 다형성"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.86
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["cpp", "programming-language", "w3schools", "oop", "polymorphism"]
+raw_sources: ["https://www.w3schools.com/cpp/cpp_polymorphism.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[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++):
+```cpp
+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).