docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영. - Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들 (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거. - Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/ Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/ Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이 존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존). - Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/ JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동. - 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리. - Topic_Programming 최종 문서 수: 2784 → 3985.
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+---
+id: cpp-conditions-nested
+title: "C++ Nested If"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["if inside if", "dependent conditions", "C++ 중첩 if"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.83
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["cpp", "programming-language", "w3schools", "conditions", "nested-if"]
+raw_sources: ["https://www.w3schools.com/cpp/cpp_conditions_nested.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CPP Nested If]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The same short-circuit benefit from C's Nested If chapter applies unchanged — the citizenship check (`isCitizen`) is never even evaluated if `age >= 18` is false, meaning nesting still functions as a genuine short-circuit optimization in C++, not just visual grouping of related checks. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Nested if** — placing an `if` inside another `if`'s block, so the inner condition is only checked when the outer condition already holds. [S1]
+- **Dependent condition modeling** — naturally expresses "check B only if A holds." [S1]
+- **Depth caution** — avoid nesting too deeply, as it hurts readability; often combined with `else`/`else if`. [S1]
+
+## 📖 세부 내용 (Details)
+- Basic two-level nesting: `int x = 15; int y = 25; if (x > 10) { cout << "x is greater than 10\n"; if (y > 20) { cout << "y is also greater than 20\n"; } }`. [S1]
+- Voting + citizenship real-life example: `int age = 20; bool isCitizen = true; if (age >= 18) { cout << "Old enough to vote.\n"; if (isCitizen) { cout << "And you are a citizen, so you can vote!\n"; } else { cout << "But you must be a citizen to vote.\n"; } } else { cout << "Not old enough to vote.\n"; }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 동일한 중첩 if 및 단축 평가 특성이 확인됨.
+
+## 🛠️ 적용 사례 (Applied in summary)
+투표 가능 연령(18세 이상)을 먼저 확인하고, 그 안에서만 시민권 여부를 추가로 확인하는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+An inner condition (citizenship) checked only when the outer condition (age) already holds (C++):
+```cpp
+int age = 20;
+bool isCitizen = true;
+if (age >= 18) {
+  cout << "Old enough to vote.\n";
+  if (isCitizen) {
+    cout << "And you are a citizen, so you can vote!\n";
+  } else {
+    cout << "But you must be a citizen to vote.\n";
+  }
+} else {
+  cout << "Not old enough to vote.\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:** 0.83
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C++ Tutorial]]
+- **관련 개념:** [[CPP Conditions Logical]], [[CPP Conditions RealLife]], [[C Conditions Nested]]
+- **참조 맥락:** 중첩 if — 조건문 실전 예제(Conditions RealLife) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C++ Nested If — https://www.w3schools.com/cpp/cpp_conditions_nested.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Nested If" page (Astra wiki-curation, P-Reinforce v3.1 format).