refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조

에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게
[공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류.
문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인).

- Topic_Programming → Domain_Programming (내부 구조 보존)
- Topic_Graphic → Domain_Design
- Topic_Business → Domain_Product
- Topic_General → Domain_General
- _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning),
  Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing)
- 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서)
- 빈 폴더 정리 (memory/procedures)
- 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
2026-07-11 11:05:56 +09:00
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---
id: cpp-switch
title: "C++ Switch"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["switch case", "break keyword", "default keyword", "C++ switch 문"]
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", "switch"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_switch.asp"]
applied_in: []
github_commit: ""
---
# [[CPP Switch]]
## 🎯 한 줄 통찰 (One-line insight)
The syntax overview explicitly labels `break` and `default` as "optional" — a framing C's chapter never used — yet the same fall-through risk applies identically: without `break`, execution continues into subsequent cases regardless of match, meaning "optional" describes their SYNTACTIC status (the switch compiles without them) rather than their PRACTICAL necessity for correct behavior. [S1]
## 🧠 핵심 개념 (Core concepts)
- **`switch (expression)`** — evaluates the expression ONCE, then compares it against each `case` value. [S1]
- **`case x:`** — a candidate value to match; its block runs if the switch expression equals `x`. [S1]
- **`break`** — exits the switch block once a match is handled; described as OPTIONAL syntactically, though omitting it causes execution to fall through into later cases. [S1]
- **`default:`** — runs if no case matches; also optional. [S1]
## 📖 세부 내용 (Details)
- Weekday-name lookup via switch: `int day = 4; switch (day) { case 1: cout << "Monday"; break; ... case 4: cout << "Thursday"; break; ... }` — outputs "Thursday" for day 4. [S1]
- Using default for unmatched cases: `int day = 4; switch (day) { case 6: cout << "Today is Saturday"; break; case 7: cout << "Today is Sunday"; break; default: cout << "Looking forward to the Weekend"; }` — day 4 matches neither case 6 nor 7, so default runs. [S1]
## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **break와 default는 "선택 사항"이지만 실질적으로는 거의 필수**: 문법적으로는 생략 가능하다고 명시되지만, break가 없으면 이후 case로 계속 실행이 이어지는(fall-through) 문제가 C 챕터와 동일하게 존재함이 확인됨. [S1]
## 🛠️ 적용 사례 (Applied in summary)
요일 번호(1-7)를 요일 이름으로 변환하는 예제와, 주말이 아닌 요일에 대해 default로 메시지를 출력하는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]
## 💻 코드 패턴 (Code patterns)
Using default to handle any value not matched by an explicit case (C++):
```cpp
int day = 4;
switch (day) {
case 6:
cout << "Today is Saturday";
break;
case 7:
cout << "Today is Sunday";
break;
default:
cout << "Looking forward to the Weekend";
}
// Outputs "Looking forward to the Weekend"
```
## ✅ 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 Conditions RealLife]], [[CPP While Loop]], [[C Switch]]
- **참조 맥락:** switch 섹션 유일 챕터 — 반복문(Loops) 섹션의 while 루프(While Loop) 챕터로 이어짐.
## 📚 출처 (Sources)
- [S1] W3Schools — C++ Switch — https://www.w3schools.com/cpp/cpp_switch.asp
## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Switch" page (Astra wiki-curation, P-Reinforce v3.1 format).