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  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
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  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
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- Topic_Programming 최종 문서 수: 2784 → 3985.

10_Wiki/Topic_Programming/Topic_C/C_Structs_Nested.md

@@ -0,0 +1,79 @@
+---
+id: c-structs-nested
+title: "C Nested Structures"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["struct inside struct", "layered data", "C 중첩 구조체"]
+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: ["c", "programming-language", "w3schools", "structs", "nested-structs"]
+raw_sources: ["https://www.w3schools.com/c/c_structs_nested.php"]
+applied_in: []
+github_commit: ""
+---
+
+# [[C Nested Structures]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Accessing a nested struct's member requires CHAINING dot syntax (`car1.owner.firstName`) rather than a single dot — each additional layer of nesting adds one more `.` hop, meaning the access path itself mirrors the data's logical hierarchy exactly (car → owner → firstName), making deeply nested structures self-documenting about their own structure just from how you reach a value. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Nested structure** — a struct that contains ANOTHER struct as one of its members, useful for grouping related data in layers. [S1]
+- **Chained dot access** — reaching a nested member requires one `.` per layer of nesting (`car1.owner.firstName`, not a shortcut). [S1]
+- **Composition over flattening** — instead of cramming an owner's first/last name directly into the `Car` struct, a separate `Owner` struct is composed INTO `Car`, keeping each struct focused on one concept. [S1]
+
+## 📖 세부 내용 (Details)
+- Defining and nesting: `struct Owner { char firstName[30]; char lastName[30]; }; struct Car { char brand[30]; int year; struct Owner owner; };`. [S1]
+- Initializing a nested struct by passing an already-built inner struct as one field: `struct Owner person = {"John", "Doe"}; struct Car car1 = {"Toyota", 2010, person};`. [S1]
+- Chained access to reach the innermost value: `printf("Owner: %s %s\n", car1.owner.firstName, car1.owner.lastName);`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
+
+## 🛠️ 적용 사례 (Applied in summary)
+자동차(Car) 구조체 안에 소유자(Owner) 구조체를 중첩시켜 자동차와 소유자 정보를 계층적으로 묶는 예제가 원문에서 직접 실전 활용 사례로 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Chained dot-access to reach a value inside a nested struct (C):
+```c
+struct Owner {
+  char firstName[30];
+  char lastName[30];
+};
+struct Car {
+  char brand[30];
+  int year;
+  struct Owner owner; // Nested structure
+};
+int main() {
+  struct Owner person = {"John", "Doe"};
+  struct Car car1 = {"Toyota", 2010, person};
+  printf("Owner: %s %s\n", car1.owner.firstName, car1.owner.lastName);
+  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:** 0.85
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C Tutorial]]
+- **관련 개념:** [[C Structs]], [[C Structs Padding]]
+- **참조 맥락:** 중첩 구조체 — 구조체 정렬/패딩(Structs Padding) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C Nested Structures — https://www.w3schools.com/c/c_structs_nested.php
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C Nested Structures" page (Astra wiki-curation, P-Reinforce v3.1 format).