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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-arrays-multi C++ Multi-Dimensional Arrays Programming_Language draft conceptual
2D array
3D array
battleship game
C++ 다차원 배열
B 0.86 2026-07-04 2026-07-04
cpp
programming-language
w3schools
arrays
multidimensional
https://www.w3schools.com/cpp/cpp_arrays_multi.asp

CPP Multi-Dimensional Arrays

🎯 한 줄 통찰 (One-line insight)

The Battleship mini-game demonstrates that a 2D bool array can serve as a complete GAME STATE representation — ship positions stored as true/false grid cells, hit-tracking done by simply flipping a cell to false after a hit — showing multi-dimensional arrays aren't just abstract grid storage but a natural fit for representing real interactive state that changes over a program's runtime. [S1]

🧠 핵심 개념 (Core concepts)

  • Multi-dimensional array — "an array of arrays"; each additional [] in the declaration adds one more dimension. [S1]
  • 2D array (type name[rows][cols]) — declared with two bracket pairs; initialized with nested array literals ({ {...}, {...} }). [S1]
  • Dual-index accessletters[row][col] addresses a specific cell; zero-based. [S1]
  • One nested loop per dimension — a 2D array needs 2 nested loops; a 3D array needs 3. [S1]
  • Grids as game state — a bool 2D array can model ship positions in a Battleship-style game; a hit is registered by flipping the cell's value to false. [S1]

📖 세부 내용 (Details)

  • Creating and accessing a 2D array: string letters[2][4] = { {"A","B","C","D"}, {"E","F","G","H"} }; cout << letters[0][2]; // "C". [S1]
  • A 3D array declaration and full triple-nested loop: string letters[2][2][2] = {...}; for (i...) { for (j...) { for (k...) { cout << letters[i][j][k]; } } }. [S1]
  • Battleship game using a 2D bool array as ship-position state: bool ships[4][4] = { {0,1,1,0}, {0,0,0,0}, {0,0,1,0}, {0,0,1,0} }; if (ships[row][column]) { ships[row][column] = 0; hits++; }. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

  • 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources). C 챕터와 동일한 다차원 배열 구조/접근 방식이 확인됨.

🛠️ 적용 사례 (Applied in summary)

4x4 격자에 배 위치를 bool 값으로 저장하고, 명중 시 해당 칸을 0으로 바꾸는 배틀십 미니게임이 원문에서 직접 실전 활용 사례로 제시됨(다차원 배열이 실제 게임 상태를 표현하는 방법). [S1]

💻 코드 패턴 (Code patterns)

A 2D bool array modeling ship positions, with a hit flipping the cell to false (C++):

bool ships[4][4] = {
  { 0, 1, 1, 0 },
  { 0, 0, 0, 0 },
  { 0, 0, 1, 0 },
  { 0, 0, 1, 0 }
};
if (ships[row][column]) {
  ships[row][column] = 0; // register the hit
  hits++;
}

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)

📚 출처 (Sources)

📝 변경 이력 (Change history)

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