


c_str() vs. data() in Standard String Implementations
The distinction between c_str() and data() functions in STL and similar implementations is widely believed to be based on null termination. Supposedly, c_str() always provides a null-terminated string, while data() does not.
However, in practice, implementations often collapse this distinction by making data() call c_str() internally. This may lead to perplexity regarding the actual difference between the two functions.
Correct Usage and Scenarios
The documentation emphatically states that c_str() should be used when a null-terminated string is required. If a non-null-terminated string is acceptable, data() can be used, as it may offer better performance in specific implementations.
Beyond Character-Based Strings
It's crucial to note that strings in C are not limited to character data. They can contain elements of any type. In such cases, data() becomes more meaningful as it directly accesses the underlying data, while c_str() is less relevant due to its emphasis on character-based strings.
C 11 and Beyond: Convergence
In C 11 and later versions of the standard, data() is now required to be null-terminated, aligning its behavior with that of c_str(). This eliminates the previous distinction between the two functions, ensuring that they perform the same operation.
The above is the detailed content of Do c_str() and data() in Standard String Implementations Differ Significantly?. For more information, please follow other related articles on the PHP Chinese website!

This article details C function return types, encompassing basic (int, float, char, etc.), derived (arrays, pointers, structs), and void types. The compiler determines the return type via the function declaration and the return statement, enforcing

Gulc is a high-performance C library prioritizing minimal overhead, aggressive inlining, and compiler optimization. Ideal for performance-critical applications like high-frequency trading and embedded systems, its design emphasizes simplicity, modul

This article explains C function declaration vs. definition, argument passing (by value and by pointer), return values, and common pitfalls like memory leaks and type mismatches. It emphasizes the importance of declarations for modularity and provi

This article details C functions for string case conversion. It explains using toupper() and tolower() from ctype.h, iterating through strings, and handling null terminators. Common pitfalls like forgetting ctype.h and modifying string literals are

This article examines C function return value storage. Small return values are typically stored in registers for speed; larger values may use pointers to memory (stack or heap), impacting lifetime and requiring manual memory management. Directly acc

This article analyzes the multifaceted uses of the adjective "distinct," exploring its grammatical functions, common phrases (e.g., "distinct from," "distinctly different"), and nuanced application in formal vs. informal

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

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


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Dreamweaver CS6
Visual web development tools

Atom editor mac version download
The most popular open source editor

SublimeText3 English version
Recommended: Win version, supports code prompts!
