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C language data structure: analysis of common interview questions

Data structures are key knowledge points in C language interviews: pointers and arrays: Understand pointers point to the array start address and are used to access and modify array elements. Linked List: Implement a one-way linked list to master the creation, insertion and deletion operations. Stack: Use arrays to build a stack to understand stack pressing, stacking and viewing stack top operations. Queue: Use arrays to implement queues to master the operations of joining, dequeuing and viewing team heads.

Apr 04, 2025 am 10:33 AM

数据结构 c语言 overflow

C language data structure: the application of data structure in image processing

Data structures are crucial in image processing. C language provides data structures such as arrays, linked lists, stacks and queues. Arrays are used to store image data, linked lists are used to represent edges or outlines, stacks are used to store operation history, and queues are used to store intermediate results. Practical applications include using arrays to implement grayscale image histograms and using linked lists to implement image edge detection.

Apr 04, 2025 am 10:30 AM

数据结构图像处理 c语言

C language multi-threaded programming: core knowledge analysis and practical questions answering

C language multi-threaded programming is implemented through the POSIX thread library, and its core includes thread creation, thread synchronization and thread termination. Thread creation uses the pthread_create() function. The thread synchronization mechanism includes mutexes, conditional variables and semaphores. The thread can be terminated through pthread_exit(), pthread_cancel() and pthread_join(). In practical examples, create and run multi-threaded programs, use mutexes to protect shared data, and ensure thread-safe access.

Apr 04, 2025 am 10:27 AM

多线程编程 c语言同步机制

C language comprehensive understanding of file operations

C language provides file operation functions, including opening, closing, reading, writing and moving file pointers. These functions support a variety of operations, such as reading data, writing data, and moving it in a file. Use fopen() and fclose() to open and close files, fread() and fwrite() can be used for data reading and writing, and fseek() allows users to move in files. These functions are widely used in practical applications, such as file copying.

Apr 04, 2025 am 10:24 AM

文件操作 c语言

C language conditional compilation: one step in place, master troubleshooting skills

Troubleshooting conditional compilation: Make sure that the required libraries are included (eg.). Use macro names as conditional expressions, not constants or variables. Use #endif correctly to close all conditional blocks. Confirm that the evaluation results of the conditional expression are consistent with expectations. Check whether the #define directive defines the macro correctly and does not conflict with other macros.

Apr 04, 2025 am 10:21 AM

linux c语言处理器

C language file operation: How to handle text files?

In C, file operations allow us to store and retrieve data, including text files. To process text files, you must first use fopen() to open the file, then use fgets() to read it line by line, write it with fputs(), and finally use fclose() to close the file.

Apr 04, 2025 am 10:18 AM

文件操作 c语言

C language multithreaded programming: a beginner's guide and troubleshooting

C language multithreading programming guide: Creating threads: Use the pthread_create() function to specify thread ID, properties, and thread functions. Thread synchronization: Prevent data competition through mutexes, semaphores, and conditional variables. Practical case: Use multi-threading to calculate the Fibonacci number, assign tasks to multiple threads and synchronize the results. Troubleshooting: Solve problems such as program crashes, thread stop responses, and performance bottlenecks.

Apr 04, 2025 am 10:15 AM

c语言同步机制

C language file operation: How to handle file metadata?

C language provides functions that process file metadata, including extracting file size, modifying time, and access permissions. Use the stat() function to get file metadata and modify file permissions through the chmod() function.

Apr 04, 2025 am 10:12 AM

文件 c语言

C language file operation: How to deal with temporary files?

C language file operation: Processing temporary files Temporary files are temporary files used to store temporary data. In some cases, this is very useful when you need to store some data that needs to be deleted later. In C, you can use the tmpfile() function to create temporary files. This function returns a FILE pointer to a temporary file, which will be automatically deleted when the program exits. For example, the following code creates a temporary file and writes some data: #include#includeintmain(){FILE*fp;fp=tmpfile();if(fp==NULL){

Apr 04, 2025 am 10:09 AM

文件操作 c语言

Day - Configure NixOS to use the C debugger in VSCode

I installed all packages in environment.systempackages in /etc/nixos/configuration.nix. So, in addition to gcc, to use the debugger, you also need: environment.systempackages=withpkgs; [...vscode-fhsgdb] Using vscode-fhs makes the work easier, and installing vscode packages (without fhs) will cause some inconvenience. For more information, please click here. In vscode, install this extension: For greater reliability, I "force" to create the path: environment.vari

Apr 04, 2025 am 10:06 AM

vscode c++

Stack Data Structure | Last In First Out (LIFO)

-Push (Add Element): Add an element to the top of the stack. -pop (delete element): Remove element from the top. -isfull: Checks if the stack has reached its limit (10 in this case). -isempty: Check whether the stack is empty. -Display: Show stack elements. 1. Example: Index.html

Apr 04, 2025 am 10:03 AM

ai switch

Day-Task Management (OS)

These days I rack my brains to use context to achieve task management. The code is here. Like everything else in the project, this is another "task" for Maziero to teach content. About implementation: The task management system is implemented using the system context. It manages collaboration tasks by performing one task until it explicitly switches to another task. task_t structure: represents a task that stores execution context, identifier (id) and pointers to facilitate the construction of a two-way linked queue for tasks. typedefstructtask_t{structtask_t*prev,*next;//ponteirosparausaremfilasintid;//ident

Apr 04, 2025 am 10:00 AM

操作系统 ai switch typedef

Tabs and spaces — Makefile in C

The debate among developers over tabs and spaces revolves around the preferred method of indentation in code. Advocates of “tabs” believe that tabs are semantically correct, customizable and more accessible for indentation, especially for those with visual impairment. They recommend using tabs for indentation and using spaces for alignment. Advocates of "spaces" emphasize consistency, because spaces ensure that the code formats are displayed the same on different editors and platforms, thus avoiding the issue of variable tab sizes. This approach is often preferred in team environments to maintain a unified code appearance. But if you program in C and need to use Makefile, then there is no choice - you have to use ‘Tabs’. Makefile

Apr 04, 2025 am 09:54 AM

c语言 c语言编程 notepad

How to insert an element into a BST (DSA) ?

Today we will learn bst and how to insert a single element (or we can say a single node) into a bst**. This is easy for those who already know about bst and double-linked lists, and these topics are important before reading this article. So I provided links to these topics, you can refer to it. -1. For double-linked list 2. For binary trees so before understanding how to insert a single node into bst. You must know what bst is, bst is a binary search tree. It has some properties, such as:-The value of the left node is smaller or the root node has a smaller value compared to the root and right elements. When we triple the node through the middle order trinet tree, it will give an ascending sorted array. It looks like this in order to

Apr 04, 2025 am 09:51 AM