search
HomeBackend DevelopmentC#.Net TutorialHow to define array in C language?

How to define array in C language?

Apr 30, 2019 pm 12:40 PM
c languagearray

C语言的学习中,数组可以算是基础中比较重要的内容了,也是时常会被使用到的。下面本篇文章就来给大家介绍一下c语言中数组要如何定义,希望对大家有所帮助。

How to define array in C language?

在C语言中,数组分为一维和二维

1、一维数组

定义公式:类型说明符 数组名[常量表达式];    

注意:常量表达式包括常量与符号常量,不能包含变量。

例如:

int a[5];
char c[3];

上面的示例中,定义了一个int整型数组,数组名为a,定义的数组称为数组 a。还定义了一个字符类型的数组,数组名为c,定义的数组称为数组 c。

此时数组 a 中有 5 个元素,每个元素都是 int 型变量;数组c中有 3 个元素,每个元素都是 char 型变量。

说明:数组名除了表示该数组之外,还表示该数组的首地址。数组中的元素在内存中的地址是连续分配的。

下面我们来看看C语言定义和初始化一维数组的几种形式:

示例1:整型数组的定义和初始化

int a[5] = {1, 2, 3, 4, 5};
int arr[] = {1,2,4};
int arr[10] = {1,2};

示例2:字符数组的定义和初始化

char str1[5]=“hello”;   //定义数组长度:30
char str1[30] = { 'L', 'e', 't', '\'', 's',' ', 'g', 'o', '\0' };  // 字符串长度:8;数组长度:30
char str1[30] = "Let's go";   // 字符串长度:8;数组长度:30
char str2[] = " to London!";    // 字符串长度:11 (注意开头的空格);数组长度:12

2、二维数组

定义公式:类型说明符 数组名[常量表达式][常量表达式];

例如:

int a[3][4];
char c[3][10];

上面的示例中,定义了一个3行4列的二维整型数组a和一个3行10列的二维字符数组c。

注:在定义二维数组时,可以不指定行(第一维)的长度,只指定列(第二维)的长度。第二维长度的长度不可省略。

下面我们来看看C语言定义和初始化二维数组的几种形式:

示例1:二维整型数组的定义和初始化

int a[1][3]={};
int a[][4]={1,2,3,4,5,6,7,8,9,10,11,12};
int a[][4]={{0,0,3},{},{}0,10}};

示例2:二维字符数组的定义和初始化

char c[5][5]={{'a','s','d',},{'a','s','d','c'},{'a','s','d','c','f'},{'s','d','c','f'},{'d','c','f'}};
char c[5][5]={"hgbv","jhg","jhgf","iuh","jjhs"};
char c[][5]={"ssdf","adfv"};

相关视频教程推荐:《C语言教程

The above is the detailed content of How to define array in C language?. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
C# .NET Framework vs. .NET Core/5/6: What's the Difference?C# .NET Framework vs. .NET Core/5/6: What's the Difference?May 07, 2025 am 12:06 AM

.NETFrameworkisWindows-centric,while.NETCore/5/6supportscross-platformdevelopment.1).NETFramework,since2002,isidealforWindowsapplicationsbutlimitedincross-platformcapabilities.2).NETCore,from2016,anditsevolutions(.NET5/6)offerbetterperformance,cross-

The Community of C# .NET Developers: Resources and SupportThe Community of C# .NET Developers: Resources and SupportMay 06, 2025 am 12:11 AM

The C#.NET developer community provides rich resources and support, including: 1. Microsoft's official documents, 2. Community forums such as StackOverflow and Reddit, and 3. Open source projects on GitHub. These resources help developers improve their programming skills from basic learning to advanced applications.

The C# .NET Advantage: Features, Benefits, and Use CasesThe C# .NET Advantage: Features, Benefits, and Use CasesMay 05, 2025 am 12:01 AM

The advantages of C#.NET include: 1) Language features, such as asynchronous programming simplifies development; 2) Performance and reliability, improving efficiency through JIT compilation and garbage collection mechanisms; 3) Cross-platform support, .NETCore expands application scenarios; 4) A wide range of practical applications, with outstanding performance from the Web to desktop and game development.

Is C# Always Associated with .NET? Exploring AlternativesIs C# Always Associated with .NET? Exploring AlternativesMay 04, 2025 am 12:06 AM

C# is not always tied to .NET. 1) C# can run in the Mono runtime environment and is suitable for Linux and macOS. 2) In the Unity game engine, C# is used for scripting and does not rely on the .NET framework. 3) C# can also be used for embedded system development, such as .NETMicroFramework.

The .NET Ecosystem: C#'s Role and BeyondThe .NET Ecosystem: C#'s Role and BeyondMay 03, 2025 am 12:04 AM

C# plays a core role in the .NET ecosystem and is the preferred language for developers. 1) C# provides efficient and easy-to-use programming methods, combining the advantages of C, C and Java. 2) Execute through .NET runtime (CLR) to ensure efficient cross-platform operation. 3) C# supports basic to advanced usage, such as LINQ and asynchronous programming. 4) Optimization and best practices include using StringBuilder and asynchronous programming to improve performance and maintainability.

C# as a .NET Language: The Foundation of the EcosystemC# as a .NET Language: The Foundation of the EcosystemMay 02, 2025 am 12:01 AM

C# is a programming language released by Microsoft in 2000, aiming to combine the power of C and the simplicity of Java. 1.C# is a type-safe, object-oriented programming language that supports encapsulation, inheritance and polymorphism. 2. The compilation process of C# converts the code into an intermediate language (IL), and then compiles it into machine code execution in the .NET runtime environment (CLR). 3. The basic usage of C# includes variable declarations, control flows and function definitions, while advanced usages cover asynchronous programming, LINQ and delegates, etc. 4. Common errors include type mismatch and null reference exceptions, which can be debugged through debugger, exception handling and logging. 5. Performance optimization suggestions include the use of LINQ, asynchronous programming, and improving code readability.

C# vs. .NET: Clarifying the Key Differences and SimilaritiesC# vs. .NET: Clarifying the Key Differences and SimilaritiesMay 01, 2025 am 12:12 AM

C# is a programming language, while .NET is a software framework. 1.C# is developed by Microsoft and is suitable for multi-platform development. 2..NET provides class libraries and runtime environments, and supports multilingual. The two work together to build modern applications.

Beyond the Hype: Assessing the Current Role of C# .NETBeyond the Hype: Assessing the Current Role of C# .NETApr 30, 2025 am 12:06 AM

C#.NET is a powerful development platform that combines the advantages of the C# language and .NET framework. 1) It is widely used in enterprise applications, web development, game development and mobile application development. 2) C# code is compiled into an intermediate language and is executed by the .NET runtime environment, supporting garbage collection, type safety and LINQ queries. 3) Examples of usage include basic console output and advanced LINQ queries. 4) Common errors such as empty references and type conversion errors can be solved through debuggers and logging. 5) Performance optimization suggestions include asynchronous programming and optimization of LINQ queries. 6) Despite the competition, C#.NET maintains its important position through continuous innovation.

See all articles

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

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.