---
id: cpp-data-structures
title: "C++ Data Structures and STL"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["STL", "Standard Template Library", "C++ 자료구조"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.87
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["cpp", "programming-language", "w3schools", "stl", "data-structures"]
raw_sources: ["https://www.w3schools.com/cpp/cpp_data_structures.asp"]
applied_in: []
github_commit: ""
---

# [[CPP Data Structures]]

## 🎯 한 줄 통찰 (One-line insight)
C has exactly ONE built-in data structure — the array — and everything else (linked lists, stacks, queues, hash-like maps) must be hand-built from structs and raw pointers; C++'s STL instead ships vector/list/stack/queue/deque/set/map as ready-made template classes, meaning the entire "how do I build a linked list" problem that consumed a whole chapter of Topic_C's Pointers section is simply gone from the C++ mental model — replaced by "which header do I include." [S1]

## 🧠 핵심 개념 (Core concepts)
- **STL (Standard Template Library)** — a library of data structures + algorithms bundled with C++, used to store and manipulate data efficiently. [S1]
- **Containers** — data structures that store data (vector, list, stack, queue, deque, set, map). [S1]
- **Iterators** — objects used to access elements of a container without knowing its internal layout. [S1]
- **Algorithms** — functions like `sort()` and `find()` that operate on containers through iterators. [S1]
- **One header per container** — each container requires its own `#include` (`<vector>`, `<list>`, `<set>`, `<map>`, `<stack>`, `<queue>`), unlike arrays which need no header. [S1]
- **Choosing a container is a design decision** — the right data structure + algorithm makes a program run faster, especially at scale; the table of 7 containers (Vector/List/Stack/Queue/Deque/Set/Map) each optimize a different access pattern. [S1]

## 📖 세부 내용 (Details)
- Container comparison table: Vector (array-like, dynamic size, index access), List (sequential, add/remove both ends, no index access), Stack (LIFO, top only), Queue (FIFO, front/back only), Deque (double-ended, index access), Set (unique elements, no index), Map (key/value pairs, access by key). [S1]
- Minimal vector usage: `vector<string> cars = {"Volvo", "BMW", "Ford", "Mazda"}; for (string car : cars) { cout << car << "\n"; }`. [S1]
- Containers + iterators + algorithms form a triangle: a container without an algorithm to search/manipulate it is not very useful, and an algorithm needs a container to operate on. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **C에는 없는 개념 층위가 통째로 추가됨**: Topic_C에는 "자료구조 챕터"가 존재하지 않았고(배열이 유일한 내장 자료구조), 연결 리스트/스택/큐는 포인터+구조체로 직접 구현하는 예제들이 Pointers 섹션에 흩어져 있었다. C++는 이를 컨테이너+반복자+알고리즘이라는 3층 구조로 라이브러리화했다는 점이 이번 챕터에서 명확히 드러남. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 문자열 vector를 만들고 for-each로 순회하는 패턴이 원문에서 STL 소개 예제로 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
Required headers per container, and a first vector example (C++):
```cpp
#include <vector>
#include <list>
#include <set>
#include <map>
#include <stack>
#include <queue>

vector<string> cars = {"Volvo", "BMW", "Ford", "Mazda"};
for (string car : cars) {
  cout << car << "\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:** 0.87
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[C++ Tutorial]]
- **관련 개념:** [[CPP Vectors]], [[CPP List]], [[CPP Stacks]], [[CPP Queues]], [[CPP Arrays]]
- **참조 맥락:** 데이터 구조(STL) 섹션의 도입 챕터 — Vectors로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — C++ Data Structures and STL — https://www.w3schools.com/cpp/cpp_data_structures.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Data Structures and STL" page (Astra wiki-curation, P-Reinforce v3.1 format).