Home Backend Development C++ Is `delete` Equivalent to `delete[]` for Dynamic Arrays in C ?

Is `delete` Equivalent to `delete[]` for Dynamic Arrays in C ?

Dec 26, 2024 pm 05:31 PM

Is `delete` Equivalent to `delete[]` for Dynamic Arrays in C  ?

Is delete[] Equivalent to delete? An Exploration of Undefined Behavior

The question of whether using delete or delete[] when deallocating a dynamic array can lead to memory leaks has been a subject of debate among programmers. To delve into this topic, let's consider the disassembly code generated by Visual Studio 2005:

; delete ptr;
0041351D mov eax,dword ptr [ptr]
00413520 mov dword ptr [ebp-0ECh],eax
00413526 mov ecx,dword ptr [ebp-0ECh]
0041352C push ecx
0041352D call operator delete (4111DBh)
00413532 add esp,4

; delete []ptr;
00413535 mov eax,dword ptr [ptr]
00413538 mov dword ptr [ebp-0E0h],eax
0041353E mov ecx,dword ptr [ebp-0E0h]
00413544 push ecx
00413545 call operator delete[] (4111E5h)
0041354A add esp,4
Copy after login

Comparing these two blocks of code reveals slight differences in their calls to operator delete and operator delete[]. These distinctions highlight the crucial question: is using delete on a dynamic array equivalent to using delete[]?

The answer to this question, unfortunately, falls under the umbrella of undefined behavior in C . Undefined behavior refers to situations where the behavior of the program is not specified by the language standard. Consequently, it might vary across compilers, compiler versions, and other factors.

Due to this inherent uncertainty, it is strongly advised to avoid using delete on arrays and strictly adhere to using delete[]. This approach ensures predictable behavior and prevents potential memory leaks or other unexpected consequences. In summary, while delete and delete[] may appear similar in certain scenarios, their subtle differences and the potential for undefined behavior demand that programmers use them with caution.

The above is the detailed content of Is `delete` Equivalent to `delete[]` for Dynamic Arrays in C ?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How does the C   Standard Template Library (STL) work? How does the C Standard Template Library (STL) work? Mar 12, 2025 pm 04:50 PM

This article explains the C Standard Template Library (STL), focusing on its core components: containers, iterators, algorithms, and functors. It details how these interact to enable generic programming, improving code efficiency and readability t

How do I use algorithms from the STL (sort, find, transform, etc.) efficiently? How do I use algorithms from the STL (sort, find, transform, etc.) efficiently? Mar 12, 2025 pm 04:52 PM

This article details efficient STL algorithm usage in C . It emphasizes data structure choice (vectors vs. lists), algorithm complexity analysis (e.g., std::sort vs. std::partial_sort), iterator usage, and parallel execution. Common pitfalls like

How does dynamic dispatch work in C   and how does it affect performance? How does dynamic dispatch work in C and how does it affect performance? Mar 17, 2025 pm 01:08 PM

The article discusses dynamic dispatch in C , its performance costs, and optimization strategies. It highlights scenarios where dynamic dispatch impacts performance and compares it with static dispatch, emphasizing trade-offs between performance and

How do I use ranges in C  20 for more expressive data manipulation? How do I use ranges in C 20 for more expressive data manipulation? Mar 17, 2025 pm 12:58 PM

C 20 ranges enhance data manipulation with expressiveness, composability, and efficiency. They simplify complex transformations and integrate into existing codebases for better performance and maintainability.

How do I handle exceptions effectively in C  ? How do I handle exceptions effectively in C ? Mar 12, 2025 pm 04:56 PM

This article details effective exception handling in C , covering try, catch, and throw mechanics. It emphasizes best practices like RAII, avoiding unnecessary catch blocks, and logging exceptions for robust code. The article also addresses perf

How do I use move semantics in C   to improve performance? How do I use move semantics in C to improve performance? Mar 18, 2025 pm 03:27 PM

The article discusses using move semantics in C to enhance performance by avoiding unnecessary copying. It covers implementing move constructors and assignment operators, using std::move, and identifies key scenarios and pitfalls for effective appl

How do I use rvalue references effectively in C  ? How do I use rvalue references effectively in C ? Mar 18, 2025 pm 03:29 PM

Article discusses effective use of rvalue references in C for move semantics, perfect forwarding, and resource management, highlighting best practices and performance improvements.(159 characters)

How does C  's memory management work, including new, delete, and smart pointers? How does C 's memory management work, including new, delete, and smart pointers? Mar 17, 2025 pm 01:04 PM

C memory management uses new, delete, and smart pointers. The article discusses manual vs. automated management and how smart pointers prevent memory leaks.

See all articles