---
id: c-memory-management
title: "C Memory Management"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["memory management overview", "C 메모리 관리"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.85
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["c", "programming-language", "w3schools", "memory-management"]
raw_sources: ["https://www.w3schools.com/c/c_memory_management.php"]
applied_in: []
github_commit: ""
---

# [[C Memory Management]]

## 🎯 한 줄 통찰 (One-line insight)
Manual memory management is presented as a genuine TRADE, not a burden imposed for no reason — the source frames it explicitly as "complicated... but also quite powerful when used correctly," meaning C hands the programmer full responsibility for allocation/deallocation specifically because that same responsibility is what enables performance optimization impossible in languages with automatic garbage collection. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Memory management** — the process of controlling how much memory a program uses, via three operations: allocation, reallocation, and deallocation ("freeing"). [S1]
- **Automatic sizing for basic variables** — C automatically reserves the correct byte size for `int`/`float`/`double`/`char` variables; `sizeof` reveals these sizes (4/4/8/1 bytes respectively). [S1]
- **Manual responsibility** — unlike some languages, C requires the PROGRAMMER to manage memory explicitly, which is more error-prone but enables finer performance control. [S1]
- **Pointers as the memory-management tool** — since dynamic memory is only reachable via pointers, memory management is inherently pointer-based work. [S1]

## 📖 세부 내용 (Details)
- Confirming basic type sizes via sizeof: `int myInt; float myFloat; double myDouble; char myChar; printf("%zu\n", sizeof(myInt)); // 4 printf("%zu\n", sizeof(myDouble)); // 8`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **수동 메모리 관리는 강력함과 위험의 트레이드오프**: 복잡하지만 제대로 사용하면 매우 강력하다는 점, 그리고 포인터를 다룰 때는 다른 메모리 주소의 데이터를 손상시킬 위험이 있으니 주의해야 한다는 점이 함께 강조됨. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 이 챕터가 개관하는 할당/재할당/해제 세 가지 개념이 다음 챕터들(Memory Allocate/Reallocate/Deallocate)에서 각각 상세히 다뤄지는 로드맵 역할을 한다. [S1]

## 💻 코드 패턴 (Code patterns)
Checking the actual byte sizes of C's basic types with sizeof (C):
```c
int myInt;
float myFloat;
double myDouble;
char myChar;
printf("%zu\n", sizeof(myInt));    // 4 bytes
printf("%zu\n", sizeof(myFloat));  // 4 bytes
printf("%zu\n", sizeof(myDouble)); // 8 bytes
printf("%zu\n", sizeof(myChar));   // 1 byte
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.85
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[C Tutorial]]
- **관련 개념:** [[C Memory Access]], [[C Memory Allocate]]
- **참조 맥락:** 메모리 관리 개관 — 메모리 할당(Memory Allocate) 챕터로 이어짐.

## 📚 출처 (Sources)
- [S1] W3Schools — C Memory Management — https://www.w3schools.com/c/c_memory_management.php

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