2nd/10_Wiki/Dev/Topic_CPP/CPP_Conditions_RealLife.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-reallife	C++ If ... Else Examples	Programming_Language	draft	conceptual		real-life if else even or odd example C++ 조건문 실전 예제		B	0.82	2026-07-04	2026-07-04			cpp programming-language w3schools conditions real-life-example	https://www.w3schools.com/cpp/cpp_conditions_reallife.asp

CPP If ... Else Examples

🎯 한 줄 통찰 (One-line insight)

The five worked scenarios (door code, positive/negative/zero, voting age, nested citizenship check, even/odd via %) mirror C's real-life if/else chapter almost verbatim — the sole notable omission is C's temperature-banding example, meaning this chapter consolidates the same core parity-check and equality-check idioms while trimming one example from the C original. [S1]

🧠 핵심 개념 (Core concepts)

• This chapter is a compilation — worked real-life if/else scenarios consolidating patterns from every prior Conditions sub-chapter. [S1]
• Door-code check — a single == equality check gating access. [S1]
• Positive/negative/zero classification — a three-way if/else if/else chain. [S1]
• Even/odd via modulus — num % 2 == 0 is the standard parity-check idiom, same as in C. [S1]

📖 세부 내용 (Details)

• Door code check: int doorCode = 1337; if (doorCode == 1337) { cout << "Correct code.\nThe door is now open.\n"; } else { cout << "Wrong code.\nThe door remains closed.\n"; }. [S1]
• Positive/negative/zero: int myNum = 10; if (myNum > 0) { cout << "The value is a positive number.\n"; } else if (myNum < 0) { cout << "The value is a negative number.\n"; } else { cout << "The value is 0.\n"; }. [S1]
• Even/odd check: int myNum = 5; if (myNum % 2 == 0) { cout << myNum << " is even.\n"; } else { cout << myNum << " is odd.\n"; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

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

🛠️ 적용 사례 (Applied in summary)

도어락 코드 확인, 숫자 부호 판별, 투표 연령, 짝/홀수 판별 등이 원문에서 직접 제시되며, 각각이 조건문 섹션 전체를 종합한 실전 활용 사례다. [S1]

💻 코드 패턴 (Code patterns)

The standard parity-check idiom using the modulus operator (C++):

int myNum = 5;
if (myNum % 2 == 0) {
  cout << myNum << " is even.\n";
} else {
  cout << myNum << " is odd.\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: 0.82
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: C++ Tutorial
• 관련 개념: CPP Conditions Nested, CPP Operators Arithmetic, CPP Switch
• 참조 맥락: 조건문 섹션 마지막 — switch 문(Switch) 섹션으로 이어짐.

📚 출처 (Sources)

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

📝 변경 이력 (Change history)

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