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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

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  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.

2026-07-05 00:39:13 +09:00

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title

C Functions

🎯 한 줄 통찰 (One-line insight)

The source reveals that main() and printf() — the two things every C beginner types on day one — are ALREADY functions, meaning the concept being "introduced" in this chapter isn't new at all; the learner has been using functions the entire tutorial without a name for it, and this chapter is really just formalizing vocabulary for a pattern already internalized. [S1]

🧠 핵심 개념 (Core concepts)

Function — a block of code that only runs when explicitly CALLED, not automatically at declaration time. [S1]
void return type — indicates the function returns no value (covered in more depth in the Parameters chapter). [S1]
Declaration vs. execution timing — declaring a function only "saves it for later use"; nothing inside runs until it's called. [S1]
Repeatable calls — the same function can be called multiple times, each execution independent. [S1]
Code reuse motivation — "define the code once, and use it many times" is the core justification for functions. [S1]

📖 세부 내용 (Details)

Calling the same function three times: void myFunction() { printf("I just got executed!"); } int main() { myFunction(); myFunction(); myFunction(); return 0; } — prints the message three times. [S1]
A function performing a fixed calculation: void calculateSum() { int x = 5; int y = 10; int sum = x + y; printf("The sum of x + y is: %d", sum); } — explicitly noted as LIMITED since x/y are hardcoded, motivating the next chapter's parameters. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — main()과 printf() 자체가 이미 함수라는 사실을 상기시키는 것이 이 챕터의 핵심 실전 통찰이다. [S1]

💻 코드 패턴 (Code patterns)

Calling the same function multiple times (C):

void myFunction() {
  printf("I just got executed!");
}
int main() {
  myFunction();
  myFunction();
  myFunction();
  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: 0.86
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: C Tutorial
관련 개념: C Memory RealLife, C Functions Decl
참조 맥락: 함수 섹션 첫 챕터 — 함수 선언과 정의(Functions Decl) 챕터로 이어짐.

📚 출처 (Sources)

[S1] W3Schools — C Functions — https://www.w3schools.com/c/c_functions.php

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "C Functions" page (Astra wiki-curation, P-Reinforce v3.1 format).

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