2nd/10_Wiki/Dev/Topic_CPP/CPP_Conditions_ElseIf.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
cpp-conditions-elseif	C++ Else If	Programming_Language	draft	conceptual		else if chain top to bottom evaluation C++ else if 문		B	0.83	2026-07-04	2026-07-04			cpp programming-language w3schools conditions else-if	https://www.w3schools.com/cpp/cpp_conditions_elseif.asp

CPP Else If

🎯 한 줄 통찰 (One-line insight)

The first-match-wins rule (conditions checked top-to-bottom, stopping at the first true match, even if a later condition would also hold) is stated with the exact same wording and the exact same time-of-day example as C's chapter — reconfirming that C++'s else if chain evaluation semantics are inherited from C without modification. [S1]

🧠 핵심 개념 (Core concepts)

• else if — tests a new condition only if the preceding condition(s) were false. [S1]
• First-match-wins evaluation — conditions checked top to bottom; the first true condition's block runs, remaining conditions are skipped. [S1]
• Boolean-variable chaining — each condition in the chain can be pre-computed into a descriptively-named bool. [S1]

📖 세부 내용 (Details)

• Time-of-day chain: int time = 16; if (time < 12) { cout << "Good morning."; } else if (time < 18) { cout << "Good day."; } else { cout << "Good evening."; } // Outputs "Good day.". [S1]
• Same chain with named booleans: bool isMorning = time < 12; bool isDay = time < 18; if (isMorning) {...} else if (isDay) {...} else {...}. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 완전히 동일한 우선 매칭 규칙임이 확인됨.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 시간대에 따라 아침/낮/저녁 인사를 구분하는 것이 else if 체인의 대표적인 실전 활용 예시다. [S1]

💻 코드 패턴 (Code patterns)

Chained else-if conditions evaluated top-to-bottom, stopping at the first match (C++):

int time = 16;
if (time < 12) {
  cout << "Good morning.";
} else if (time < 18) {
  cout << "Good day.";
} else {
  cout << "Good evening.";
}
// Outputs "Good day."

✅ 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 Else, CPP Conditions Shorthand, C Conditions ElseIf
• 참조 맥락: else if 체인 — 삼항 연산자(Conditions Shorthand) 챕터로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ Else If — https://www.w3schools.com/cpp/cpp_conditions_elseif.asp

📝 변경 이력 (Change history)

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