2nd/10_Wiki/Dev/Topic_CPP/CPP_Operators_Precedence.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-operators-precedence	C++ Operator Precedence	Programming_Language	draft	conceptual		order of operations parentheses precedence C++ 연산자 우선순위		B	0.83	2026-07-04	2026-07-04			cpp programming-language w3schools operators precedence	https://www.w3schools.com/cpp/cpp_operators_precedence.asp

CPP Operator Precedence

🎯 한 줄 통찰 (One-line insight)

The precedence hierarchy and left-to-right associativity rule are IDENTICAL to C's version, right down to the exact same worked examples (2 + 3 * 4 = 14, 10 - 2 + 5 = 13) — meaning C++ programmers can reuse C's mental model for expression evaluation without any adjustment, since neither the ranking of operator tiers nor the tie-breaking rule for same-tier operators changed. [S1]

🧠 핵심 개념 (Core concepts)

• Precedence hierarchy (highest to lowest) — () → *///% → +/- → comparison (>,<,>=,<=) → equality (==,!=) → && → || → =. [S1]
• Multiplication before addition — 2 + 3 * 4 evaluates * first, giving 14. [S1]
• Parentheses override precedence — (2 + 3) * 4 forces addition first, giving 20. [S1]
• Left-to-right associativity for same-tier operators — 10 - 2 + 5 evaluates as (10 - 2) + 5 = 13. [S1]

📖 세부 내용 (Details)

• Precedence demonstration: int result1 = 2 + 3 * 4; // 14 int result2 = (2 + 3) * 4; // 20. [S1]
• Left-to-right associativity demonstration: int result1 = 10 - 2 + 5; // 13 int result2 = 10 - (2 + 5); // 3. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

• 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 우선순위표·예제가 완전히 동일함이 확인됨.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 계산 순서가 애매할 때 항상 괄호를 사용하라는 권고가 C 챕터와 동일하게 강조된다. [S1]

💻 코드 패턴 (Code patterns)

Same-precedence operators evaluate strictly left to right unless parentheses override it (C++):

int result1 = 10 - 2 + 5;   // (10 - 2) + 5 = 13
int result2 = 10 - (2 + 5); // 10 - 7 = 3

✅ 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 Operators Logical, CPP Strings, C Operators Precedence
• 참조 맥락: 연산자 섹션 마지막 — 문자열(Strings) 섹션으로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — C++ Operator Precedence — https://www.w3schools.com/cpp/cpp_operators_precedence.asp

📝 변경 이력 (Change history)

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