Linked List Operations and Implementation Patterns in C
This document covers fundamental linked list operations including element removal, list reversal, node swapping, and intersection detection.
Removing Elements with Specific Value
Approach Without Dummy Node
This implementation handles edge cases by checking the head node separately before processing the rest of the list.
struct ListNode* remov ...
Posted on Thu, 16 Jul 2026 16:41:13 +0000 by foobar
Signal Handling and Message Queue Communication in C
Basic Signal Handling
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
void signal_handler(int signum) {
if (signum == SIGINT) {
printf("User pressed CTRL + C\n");
}
}
int main() {
// Capture SIGINT signal
if (signal(SIGINT, signal_handler) == SIG_ERR) {
perror("signal ...
Posted on Sat, 11 Jul 2026 17:27:23 +0000 by Phoenix~Fire
Understanding Unions and Enums in C
Unions and enums are two essential user-defined types in C that provide memory efficiency and code clarity, respectively.
Union Declaration and Memory Layout
A union groups multiple variables of different types into a single memory location. The compiler allocates enough memory to hold the largest member. All member share the same starting addr ...
Posted on Tue, 07 Jul 2026 17:34:17 +0000 by Leveecius
Efficient Embedded Programming Techniques
Calculating Sturcture Member Size
#include <stdio.h>
// Get size of struct member
#define MEMBER_SIZE(type, member) sizeof(((type*)0)->member)
// Get offset of struct member
#define MEMBER_OFFSET(type, member) ((size_t)(&(((type*)0)->member)))
typedef struct {
char x;
char y;
char z;
} coord_t;
typedef struct {
...
Posted on Thu, 02 Jul 2026 16:07:32 +0000 by Syranide
Using OpenMP with GCC
OpenMP is a programming standard for shared-memory parallel systems, proposed by the OpenMP Architecture Review Board (ARB). Its not a new language but a compilation directive extension to base languages, supporting C/C++. Since OpenMP supports different languages, specifics may vary.
OpenMP defines directives, runtime libraries, and environmen ...
Posted on Sun, 28 Jun 2026 16:23:00 +0000 by goldfiles
Heap Sort Implementation and Optimization in C
Overview of Heap Sort
Heap sort is a powerful comparison-based sorting algorithm that leverages the properties of a binary heap data structure. It offers a time complexity of O(n log n), making it suitable for sorting large datasets. Unlike some other sorting algorithms, heap sort is in-place and has consistent performance across best, average, ...
Posted on Sat, 27 Jun 2026 17:28:28 +0000 by emediastudios
Dynamic Sequential List Implementation in C with Merging Algorithms
Linear Lisst: Dynamic Sequential Storage
A linear list is a finite sequence of n data elements. This implementation uses dynamic memory allocation to manage the underlying array, allowing the list to grow as elements are inserted.
Dynamic Sequential List Header (dynSqList.h)
#ifndef DYN_SQLIST_H
#define DYN_SQLIST_H
#include "errorRecord. ...
Posted on Fri, 26 Jun 2026 17:41:30 +0000 by justinchrono
Basic C Programming Exercises and Code Examples
Task 1: Displaying Patterns
The following program displays a simple character pattern:
#include <stdio.h>
int main() {
printf(" O \n");
printf("<H>\n");
printf("I I\n");
printf(" O \n");
printf("<H>\n");
printf("I I\n");
return 0;
}
Ano ...
Posted on Fri, 26 Jun 2026 17:12:13 +0000 by Huuggee
Resolving Multiple Definition Errors for Global Variables in C
The Problem
When multiple source files include a header that defines global variables, the linker reports multiple definition errors. Consider a header file (main.h) that directly defines global arrays:
#ifndef __MAIN_H
#define __MAIN_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define max 100
struct studen ...
Posted on Wed, 24 Jun 2026 17:37:45 +0000 by Scooby08
Using RetDec to Decompile a Simple C Program
Consider the following C source file:
#include <stdio.h>
void printff() {
printf("this is called funtion printff");
}
int main(int argc, char *argv[]) {
printff();
printf("This is helo analysis");
if (argc == 2) {
printf("The argument supplied is %s\n", argv[1]);
} else if (argc ...
Posted on Tue, 23 Jun 2026 18:01:09 +0000 by jpt62089