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68 lines
2.9 KiB
Markdown
68 lines
2.9 KiB
Markdown
---
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id: cpp-math
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title: "C++ Math"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["max min functions", "cmath library", "C++ 수학 함수"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.83
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["cpp", "programming-language", "w3schools", "math", "cmath"]
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raw_sources: ["https://www.w3schools.com/cpp/cpp_math.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CPP Math]]
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## 🎯 한 줄 통찰 (One-line insight)
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`max()` and `min()` are used with NO header include shown in the source's own examples, while `sqrt()`, `round()`, and `log()` explicitly require `#include <cmath>` — a distinction the source draws implicitly through its section structure (max/min presented first, standalone; `<cmath>` functions grouped separately under their own header requirement), suggesting C++ split basic comparison-style math from the broader mathematical function library across different availability boundaries. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`max(x, y)`** — returns the higher of two values. [S1]
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- **`min(x, y)`** — returns the lower of two values. [S1]
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- **`<cmath>` header** — required for broader math functions: `sqrt()` (square root), `round()` (rounds a number), `log()` (natural logarithm), and more. [S1]
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## 📖 세부 내용 (Details)
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- Basic max/min: `cout << max(5, 10); cout << min(5, 10);`. [S1]
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- cmath-based functions: `#include <cmath> cout << sqrt(64); cout << round(2.6); cout << log(2);`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — sqrt/round/log 등 cmath 함수들이 이후 챕터의 다양한 계산 로직에서 재사용될 수 있는 기본 도구다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Using cmath library functions for square root, rounding, and logarithm (C++):
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```cpp
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#include <cmath>
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cout << sqrt(64); // 8
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cout << round(2.6); // 3
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cout << log(2); // 0.693147...
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.83
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[C++ Tutorial]]
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- **관련 개념:** [[CPP Strings Numbers]], [[CPP Booleans]], [[C Math]]
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- **참조 맥락:** 수학 섹션 유일 챕터 — 불리언(Booleans) 섹션으로 이어짐.
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## 📚 출처 (Sources)
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- [S1] W3Schools — C++ Math — https://www.w3schools.com/cpp/cpp_math.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Math" page (Astra wiki-curation, P-Reinforce v3.1 format).
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