What are the naming styles of C user identifiers?
Apr 03, 2025 pm 01:06 PM
C language identifier naming rules: consist of letters, numbers and underscores. The first character must be a letter or underscore and is case sensitive. The naming styles include camel, underlined and Hungarian nomenclature. It is recommended to use a concise and clear camel nomenclature, but team consistency is more important. Naming should be based on the name and avoid using meaningless identifiers. Naming style has nothing to do with performance, and the main purpose is to improve code readability and maintainability.
C language user identifier naming, this thing looks simple, but in fact there are many ways. If you don't understand, the code you wrote is like a pot of stew, and you will be overwhelmed when you look back. In this article, let’s talk about the naming of this identifier so that you can feel more at ease when writing code.
Let’s talk about the conclusion first: There are no mandatory regulations for naming C language identifiers, but there are good habits that are conventional. Following these habits can make your code clearer, easier to maintain, and better reflect your programming literacy. Don't follow? Then your code is waiting for your teammates to complain about!
Basic knowledge, we need to lay the groundwork
In C language, identifiers are the names you give to variables, functions, structures, etc. Remember, an identifier can only consist of letters, numbers, and underscores, and the first character must be a letter or underscore. Case sensitive, myVar and myvar are two different identifiers. You must keep this rule in mind, otherwise the compiler will report you an error without mercy.
Core: Naming style, this is the key
Let’s analyze several common naming styles one by one:
- Camel Case: capitalize the initial letter of a word, such as
myVariable,userName. This style looks more comfortable and is more commonly used. But be careful whether the first letter of the first word should be capitalized depends on the specific situation. - Underscore nomenclature (Snake Case): Words are connected by underscores, such as
my_variableanduser_name. This style is also quite popular in C language, especially in some large projects, with high clarity. However, with too many underscores, it looks a bit cumbersome. - Hungarian Nomenclature (Hungarian Notation): Prefixes the variable name to represent the variable type, such as
int iAge,char *szName. This method was common in early C programming, but it has been gradually eliminated because the type information compiler already knows that adding prefixes seems redundant and it is also troublesome to maintain. Unless you have a particularly strong need for type checking of your code, it is not recommended.
Code examples to make you more intuitive
Hump ??style:
<code class="c">#include <stdio.h> int main() { int studentAge = 20; char studentName[50] = "John Doe"; printf("Student age: %d, Name: %s\n", studentAge, studentName); return 0; }</stdio.h></code>
Underlined:
<code class="c">#include <stdio.h> int main() { int student_age = 20; char student_name[50] = "John Doe"; printf("Student age: %d, Name: %s\n", student_age, student_name); return 0; }</stdio.h></code>
Advanced usage, and some pitfalls
There is actually no absolute good or bad choice in naming style. The key lies in the consistency of the team and the readability of the code. Once you choose a style, stick to it, don't use hump for a while, or underscore for a while, which will make your code look messy.
In addition, naming should be done to see the name and know the meaning. Do not use meaningless identifiers such as a , b , and c , unless they are used as temporary variables in some very simple algorithms. Good naming can greatly improve the readability and maintainability of the code.
Performance optimization? This has nothing to do with the naming style
Naming style has little impact on performance, mainly to improve the readability and maintainability of the code. Don't think about improving performance by modifying the naming style, it's a pure waste of time.
Best practices, my experience
I personally recommend the camel nomenclature, which is concise and clear and easy to read. But in some places where types need to be emphasized, the underline nomenclature is also good. The most important thing is to maintain consistency within the team and stick to it after choosing a style. Remember, the code is written for people to read, not for compilers to read. Only clear and easy-to-understand code can reduce bugs and improve efficiency. This is the kingly way!
The above is the detailed content of What are the naming styles of C user identifiers?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
High return expectations for cryptocurrency tokens in July 2025: hype or reality?
Jul 04, 2025 pm 08:42 PM
As July 2025 approaches, the crypto market is hotly discussing which tokens may bring high returns. Are names like Pi, PEPE and FloppyPepe really worth the risky investment? Potential cryptocurrencies worth paying attention to in July 2025: virtual fire or real gold? As mid-2025, the heat of discussions on high-yield crypto assets continues to heat up. Bitcoin trends and "altcoin season" expectations have attracted investors' attention. Do tokens like PiNetwork, PEPE and FloppyPepe have the potential to bring considerable investment returns? Let's analyze its prospects one by one. Altcoin Market: Can July get what it wants? Against the backdrop of Bitcoin’s expected record of historical highs, the “altcoin season” seems to be brewing. Back
What currency is bnb What is bnb?
Jul 04, 2025 pm 12:18 PM
BNB is a platform token issued by Binance and has now become a native functional token of the BNB Chain ecosystem. Its main uses include 1. Transaction fee discounts; 2. BNB Chain fuel fee; 3. Participate in the Launchpad project; 4. Payment and consumption. The recommended orders of top exchanges are: 1. Binance, providing the deepest BNB liquidity; 2. Ouyi, comprehensive product line; 3. Huobi, stable and safe operation; 4. Gate.io, rich currency selection; 5. KuCoin, many emerging projects; 6. Kraken, famous for its safety and compliance.
Binance's 25th issue of HODLer airdrop is coming, 125 million SAHARA is waiting for you to divide it up
Jul 04, 2025 pm 06:06 PM
In today's era of rapid development of technology, the integration of artificial intelligence and blockchain is gradually becoming a new trend. The Sahara AI (SAHARA) project came into being, and it is committed to creating the first full-stack AI native blockchain platform, making the future of artificial intelligence more accessible, fair and just, and open to everyone.
Elon Musk, Sam Altman and Robinhood: A tug-of-war of tokenization?
Jul 04, 2025 pm 08:30 PM
Robinhood launched OpenAI and SpaceX tokenized stocks caused controversy, with Elon Musk and Sam Altman fighting each other over the nature of the so-called "fake equity". Recently, the intersection of Elon Musk, Sam Altman and Robinhood has become the focus of public attention, all of which stems from tokenized equity. Robinhood's launch of tokenized stocks in private companies such as OpenAI and SpaceX to European users has sparked heated debate and accompanied by clarification and criticism from all parties. Robinhood's tokenized equity: A bold attempt? Robin, led by CEO Vlad Tenev
What is Impossible Cloud Network (ICNT)? How? A comprehensive introduction to the ICN project that Binance will launch soon
Jul 07, 2025 pm 07:06 PM
Contents 1. What is ICN? 2. ICNT latest updates 3. Comparison and economic model between ICN and other DePIN projects and economic models 4. Conclusion of the next stage of the DePIN track At the end of May, ICN (ImpossibleCloudNetwork) @ICN_Protocol announced that it had received strategic investment in NGPCapital with a valuation of US$470 million. Many people's first reaction was: "Has Xiaomi invested in Web3?" Although this was not Lei Jun's direct move, the one who had bet on Xiaomi, Helium, and WorkFusion
Remittix, Monero and Cryptocurrency - The Evolution of Fiatcoin: Why has it caused heated discussion?
Jul 04, 2025 pm 09:33 PM
Explore Remittix (RTX), Monero (XMR) and Crypto-Fiat Trends: How these projects shape the future of cryptocurrencies through practicality and community orientation. Remittix, Monero and Cryptocurrency Evolution: What is the hottest speculation? The crypto market is always in a dynamic change, and new and old projects are competing for investors' attention. Currently, Remittix (RTX), Monero (XMR) and crypto-fiat currency directions are becoming the focus of discussion. Let’s find out what driving forces are behind this wave of popularity? Remittix: The emerging token with emerging potential is gradually gaining market attention, and its development trajectory has been compared to the early stages of Bitcoin and Ethereum by some people. "CryptoR
Bitcoin, Cryptocurrency, Buy Now: Decode the Latest Trends and Hidden Treasures
Jul 04, 2025 pm 09:42 PM
Is Bitcoin the best cryptocurrency investment option now? Explore Bitcoin’s soar, rising altcoins and top P2E games. Bitcoin, Cryptocurrency, Buy Now: Interpreting the latest trends and hidden opportunities Bitcoin has been active recently, and the entire cryptocurrency market is hotly discussed. Is this the best time to buy? Let's dive into the latest trends and reveal potential investment opportunities in this ever-changing market. Bitcoin is rising strongly: breaking through $109,000 – What is the future trend? Bitcoin has recently successfully broken through the $109,000 mark, a rally affected by positive news from BlackRock ETF, improved global situation and depreciation of the dollar. This breakthrough once again inspired people to set a new high for it
2025 Stablecoin Investment Tutorial How to Choose a Safe Stablecoin Platform
Jul 07, 2025 pm 09:09 PM
How do novice users choose a safe and reliable stablecoin platform? This article recommends the Top 10 stablecoin platforms in 2025, including Binance, OKX, Bybit, Gate.io, HTX, KuCoin, MEXC, Bitget, CoinEx and ProBit, and compares and analyzes them from dimensions such as security, stablecoin types, liquidity, user experience, fee structure and additional functions. The data comes from CoinGecko, DefiLlama and community evaluation. It is recommended that novices choose platforms that are highly compliant, easy to operate and support Chinese, such as KuCoin and CoinEx, and gradually build confidence through a small number of tests.
