How to use C language arrays: First declare the creation and initialization; then use the subscript of the array to access the element content of the array, or use the C language pointer to access the array elements.
In C language, a set of data is called an array. After the creation and initialization are first declared, the element content of the array can be accessed using the subscript of the array. You can also use C language pointers to access array elements.
To put data into memory, memory space must be allocated first. To put in 4 integers, you have to allocate 4 memory spaces of type int:
Define the array int a[length]; The array is called a.
Such a set of data is called an array (Array), each data it contains is called an array element (Element), and the number of data contained is called the array length (Length) ), for example int a[4]; defines an integer array with a length of 4 and the name is a.
Each element in the array has a serial number. This serial number starts from 0, not from the familiar 1, and is called an index. When using array elements, just specify the subscript, in the form:
arrayName[index]
arrayName is the array name, and index is the subscript. For example, a[0] represents the 0th element, and a[3] represents the 3rd element.
Creation and initialization of arrays
#include<stdio.h>
int main()
{
char arr1[] = { 'a', 'b', 'c' };
char arr2[3] = "abc";
char *p = "abc";//这里只是把a的地址放进了p里边
return 0;
}
##Simple use of arrays
#include<stdio.h>
int main()
{
int arr[10] = { 0 };
int i = 0;
for (i = 0; i < 10; i++)//i<11是不可以的，不可以越界访问
{
arr[i] = i;
}
return 0;
} Arrays are accessed using subscripts, which start from 0. The size of the array can be calculated. (sz = sizeof(arr)/sizeof(arr[0]));
Pointer access to the array uses
int main()
{
int arr[10] = { 0 };
int i = 0;
int sz = sizeof(arr) / sizeof(arr[0]);
int *p = arr;
for (i = 0; i < sz; i++)
{
//arr[i] = i; (1)
*(p + i) = i; (2)
}
for (i = 0; i < sz; i++)
{
printf("%d\n", arr[i]);//(1)和(2)的输出结果一样
}
return 0;
}From the output results, we can see that we A pointer p is defined, pointing to arr, and then we access the array through the pointer.
The above is the detailed content of How to use arrays better in C language. For more information, please follow other related articles on the PHP Chinese website!
C# and the .NET Runtime: How They Work TogetherApr 19, 2025 am 12:04 AMC# and .NET runtime work closely together to empower developers to efficient, powerful and cross-platform development capabilities. 1) C# is a type-safe and object-oriented programming language designed to integrate seamlessly with the .NET framework. 2) The .NET runtime manages the execution of C# code, provides garbage collection, type safety and other services, and ensures efficient and cross-platform operation.
C# .NET Development: A Beginner's Guide to Getting StartedApr 18, 2025 am 12:17 AMTo start C#.NET development, you need to: 1. Understand the basic knowledge of C# and the core concepts of the .NET framework; 2. Master the basic concepts of variables, data types, control structures, functions and classes; 3. Learn advanced features of C#, such as LINQ and asynchronous programming; 4. Be familiar with debugging techniques and performance optimization methods for common errors. With these steps, you can gradually penetrate the world of C#.NET and write efficient applications.
C# and .NET: Understanding the Relationship Between the TwoApr 17, 2025 am 12:07 AMThe relationship between C# and .NET is inseparable, but they are not the same thing. C# is a programming language, while .NET is a development platform. C# is used to write code, compile into .NET's intermediate language (IL), and executed by the .NET runtime (CLR).
The Continued Relevance of C# .NET: A Look at Current UsageApr 16, 2025 am 12:07 AMC#.NET is still important because it provides powerful tools and libraries that support multiple application development. 1) C# combines .NET framework to make development efficient and convenient. 2) C#'s type safety and garbage collection mechanism enhance its advantages. 3) .NET provides a cross-platform running environment and rich APIs, improving development flexibility.
From Web to Desktop: The Versatility of C# .NETApr 15, 2025 am 12:07 AMC#.NETisversatileforbothwebanddesktopdevelopment.1)Forweb,useASP.NETfordynamicapplications.2)Fordesktop,employWindowsFormsorWPFforrichinterfaces.3)UseXamarinforcross-platformdevelopment,enablingcodesharingacrossWindows,macOS,Linux,andmobiledevices.
C# .NET and the Future: Adapting to New TechnologiesApr 14, 2025 am 12:06 AMC# and .NET adapt to the needs of emerging technologies through continuous updates and optimizations. 1) C# 9.0 and .NET5 introduce record type and performance optimization. 2) .NETCore enhances cloud native and containerized support. 3) ASP.NETCore integrates with modern web technologies. 4) ML.NET supports machine learning and artificial intelligence. 5) Asynchronous programming and best practices improve performance.
Is C# .NET Right for You? Evaluating its ApplicabilityApr 13, 2025 am 12:03 AMC#.NETissuitableforenterprise-levelapplicationswithintheMicrosoftecosystemduetoitsstrongtyping,richlibraries,androbustperformance.However,itmaynotbeidealforcross-platformdevelopmentorwhenrawspeediscritical,wherelanguageslikeRustorGomightbepreferable.
C# Code within .NET: Exploring the Programming ProcessApr 12, 2025 am 12:02 AMThe programming process of C# in .NET includes the following steps: 1) writing C# code, 2) compiling into an intermediate language (IL), and 3) executing by the .NET runtime (CLR). The advantages of C# in .NET are its modern syntax, powerful type system and tight integration with the .NET framework, suitable for various development scenarios from desktop applications to web services.
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
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.
WebStorm Mac version
Useful JavaScript development tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
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.
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.
