---
id: cpp-pointers-dereference
title: "C++ Dereference"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["dereference operator", "* dual meaning", "C++ 역참조"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.85
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["cpp", "programming-language", "w3schools", "pointers", "dereference"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_pointers_dereference.asp"]
applied_in: []
github_commit: ""
---

# [[CPP Dereference]]

## 🎯 한 줄 통찰 (One-line insight)
The `*` symbol does two OPPOSITE jobs depending on where it appears — identical to C's pointer chapter — in a declaration (`string* ptr`) it CREATES a pointer, but everywhere else (`*ptr`) it DEREFERENCES one to retrieve the pointed-to value, confirming C++ inherited this exact dual-meaning confusion point from C without modification. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`*` in declaration vs. elsewhere** — `string* ptr;` creates a pointer variable; `*ptr` (outside declaration) dereferences it to get the pointed-to value. [S1]
- **Reference (`&`) vs. dereference (`*`)** — `ptr` alone gives the address; `*ptr` gives the value. [S1]

## 📖 세부 내용 (Details)
- Reference vs. dereference side by side: `string food = "Pizza"; string* ptr = &food; cout << ptr; // 0x6dfed4 (address) cout << *ptr; // Pizza (value)`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **`*`의 이중 의미가 C와 동일하게 확인됨**: 선언에서는 포인터를 만들고, 선언이 아닌 곳에서는 역참조 연산자로 동작한다는 혼동 요소가 C 챕터와 완전히 동일함. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 역참조 연산자를 이용해 포인터가 가리키는 변수의 값을 직접 변경하는 것이 다음 챕터(Modify Pointers)에서 실전 활용으로 이어진다. [S1]

## 💻 코드 패턴 (Code patterns)
Reference vs. dereference on the same pointer (C++):
```cpp
string food = "Pizza";
string* ptr = &food;
cout << ptr << "\n";  // Reference: memory address of food
cout << *ptr << "\n"; // Dereference: value of food (Pizza)
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.85
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[C++ Tutorial]]
- **관련 개념:** [[CPP Pointers]], [[CPP Pointers Modify]], [[C Pointers]]
- **참조 맥락:** 역참조 — 포인터 값 수정(Pointers Modify) 챕터로 이어짐.

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

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