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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+---
+id: cpp-variables
+title: "C++ Variables"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["variable declaration", "cout chaining", "C++ 변수"]
+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", "variables"]
+raw_sources: ["https://www.w3schools.com/cpp/cpp_variables.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CPP Variables]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Unlike C, where printing a variable requires a completely separate format-specifier mechanism (`printf("%d", myNum)`), C++'s `cout <<` can print a variable DIRECTLY and even CHAIN multiple variables and literal text together in one statement (`cout << name << " is " << age << " years old";`) — meaning C++'s output model eliminates the format-specifier/type-matching step entirely, since `<<` is overloaded to know how to print each type on its own. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Five introductory types** — `int` (whole numbers), `double` (decimals), `char` (single character, single quotes), `string` (text, double quotes), `bool` (true/false). [S1]
+- **Declaration syntax** — `type variableName = value;`, or declare first and assign later. [S1]
+- **Reassignment overwrites** — assigning a new value replaces the old one entirely. [S1]
+- **Direct variable printing via `cout <<`** — no format specifier needed, unlike C's `printf()`. [S1]
+- **Chaining text and variables** — `cout << "I am " << myAge << " years old.";` combines literal text and variable values in ONE statement using repeated `<<`. [S1]
+- **Arithmetic with variables** — `+` works between variables just as with literals: `int sum = x + y;`. [S1]
+
+## 📖 세부 내용 (Details)
+- Declare-and-assign, then print directly (no format specifier): `int myNum = 15; cout << myNum;`. [S1]
+- Chaining multiple variables and text in one cout statement: `string name = "John"; int age = 35; double height = 6.1; cout << name << " is " << age << " years old and " << height << " feet tall.";`. [S1]
+- Adding two variables: `int x = 5; int y = 6; int sum = x + y; cout << sum;`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **C++는 포맷 지정자 없이 변수를 바로 출력**: C의 printf()와 달리 cout에 변수를 직접 넣고 여러 개를 << 로 이어붙일 수 있다는 점이, 타입별 포맷 지정자를 매번 맞춰야 했던 C와의 핵심 차이로 확인됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 문자열, 정수, 실수를 하나의 cout 문에 이어붙여 사람이 읽기 좋은 문장을 만드는 패턴이 실전 출력 포맷팅의 대표 활용이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Chaining multiple variables and literal text in one cout statement (C++):
+```cpp
+string name = "John";
+int age = 35;
+double height = 6.1;
+cout << name << " is " << age << " years old and " << height << " feet tall.";
+```
+
+## ✅ 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 New Lines]], [[CPP Variables Identifiers]], [[C Variables]]
+- **참조 맥락:** 변수 섹션 첫 챕터 — 식별자 규칙(Variables Identifiers) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C++ Variables — https://www.w3schools.com/cpp/cpp_variables.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Variables" page (Astra wiki-curation, P-Reinforce v3.1 format).