---
id: cpp-inheritance
title: "C++ Inheritance"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["base class", "derived class", "C++ 상속"]
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", "inheritance"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_inheritance.asp"]
applied_in: []
github_commit: ""
---

# [[CPP Inheritance]]

## 🎯 한 줄 통찰 (One-line insight)
The `Car` class never declares a `brand` attribute or a `honk()` method of its own — it inherits BOTH directly from `Vehicle` via the single `: public Vehicle` syntax, and `myCar.honk()` works exactly as if `honk()` had been written inside `Car` itself, meaning inheritance in C++ isn't a reference or delegation mechanism but a literal MERGING of the parent's members into the child, accessible with zero extra syntax at the call site. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Inheritance** — one class (derived/child) reuses attributes and methods from another (base/parent), avoiding duplication. [S1]
- **`: public BaseClass`** — the syntax for inheriting; placed after the derived class's name. [S1]
- **Zero-syntax access to inherited members** — a child object calls inherited methods and reads inherited attributes exactly like its own, with no special prefix. [S1]
- **Why inherit** — code reusability — reuse an existing class's attributes/methods when creating a new one. [S1]

## 📖 세부 내용 (Details)
- A child class inheriting an attribute and method from its parent: `class Vehicle { public: string brand = "Ford"; void honk() { cout << "Tuut, tuut! \n"; } }; class Car: public Vehicle { public: string model = "Mustang"; }; Car myCar; myCar.honk(); // inherited from Vehicle cout << myCar.brand + " " + myCar.model; // brand inherited, model is Car's own`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Vehicle의 brand와 honk()를 Car가 그대로 물려받는 예제가 상속을 통한 코드 재사용의 대표 실전 활용이다. [S1]

## 💻 코드 패턴 (Code patterns)
A child class inheriting an attribute and method from its parent with zero extra syntax (C++):
```cpp
class Vehicle { // Base class
public:
  string brand = "Ford";
  void honk() { cout << "Tuut, tuut! \n"; }
};
class Car: public Vehicle { // Derived class
public:
  string model = "Mustang";
};
int main() {
  Car myCar;
  myCar.honk(); // inherited method, works directly
  cout << myCar.brand + " " + myCar.model;
  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:** 0.86
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[C++ Tutorial]]
- **관련 개념:** [[CPP Encapsulation]], [[CPP Inheritance Access]]
- **참조 맥락:** 상속 섹션 첫 챕터 — 상속 접근 지정자(Inheritance Access) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — C++ Inheritance — https://www.w3schools.com/cpp/cpp_inheritance.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Inheritance" page (Astra wiki-curation, P-Reinforce v3.1 format).