Practical solutions

C Howtos How-To Guides

Solve the problem. Keep building. Collection of C how-to articles

Find the answer you need

Browse practical solutions, grouped by the task you're working on.

__COUNT__ entries on this page

How to Get the Size of Array in CThis tutorial introduces methods in C to determine the size of an array. Learn how to effectively use the sizeof() operator and explore alternative methods like macros and functions. Mastering these techniques is essential for efficient memory management and array handling in C programming. How to Initialize an Array to 0 in CThis tutorial introduces different ways to initialize an array to 0 in C. Learn various methods such as static initialization, loops, memset, and compound literals to effectively set array values to zero. Whether you're a beginner or a seasoned programmer, this guide will enhance your understanding of array initialization in C. i++ vs ++i in CThis article explores the differences between the prefix increment operator (++i) and the postfix increment operator (i++) in C programming. Learn how to use these operators effectively with clear examples and practical implications for your code. Understand when to use each operator to enhance your programming skills and avoid common pitfalls. How to Use typedef enum in CThis article introduces how to use typedef enum in C, explaining its benefits and providing clear examples. Learn how to enhance code readability and maintainability with typedef enum, and discover how to use it in structs. Whether you're a beginner or looking to refine your skills, this guide will help you navigate enums in C with ease. How to Read a File in CThis article introduces how to read a file in C, covering methods like reading character by character, line by line, and storing data in an array. Learn essential techniques and best practices for efficient file handling in your C programs. Explore clear examples and explanations to enhance your programming skills. How to Print Formatted Text in CThis article demonstrates how to print formatted text in C using the printf function. Learn about format specifiers, controlling output width, and special characters to enhance your C programming skills. Discover practical examples and tips for creating clear and professional output in your programs. How to Fix Free Invalid Pointer Error in CThis article introduces how to fix free invalid pointer errors in C programming. Learn effective methods to troubleshoot and resolve memory management issues, including using Valgrind, initializing pointers to NULL, and avoiding double freeing. Improve your coding practices and write safer C programs with these practical solutions. How to Compare Strings in CThis article introduces how to compare strings in C, covering essential methods like `strcmp`, `strncmp`, and manual comparison. Learn the nuances of string representation and gain practical examples to enhance your C programming skills. Whether you're a beginner or looking to refine your knowledge, this comprehensive guide will help you understand string comparisons effectively. The Modulo Operator in CThis article introduces the modulo operator in C, explaining its usage and applications. Learn how to check even and odd numbers, use it in loops, and see clear examples to enhance your programming skills. Perfect for beginners and experienced programmers alike. How to wait Function in CThis article introduces how to use the wait function in C, providing insights into process management. Learn about its syntax, see practical code examples, and understand error handling. Whether you're a beginner or looking to enhance your skills, this guide will help you master the wait function for effective process control in your C applications. How to Use strtok Function in CThis article introduces how to use the strtok function in C, providing a comprehensive guide on tokenizing strings. Learn the syntax, explore practical examples, and understand important considerations when using strtok. Master string manipulation in C with this informative guide. How to Get User Input in CThis article introduces how to get text input from users in C. Learn various methods such as scanf and fgets, along with clear code examples and explanations. Understand the advantages and limitations of each method to enhance your C programming skills. Exponents in CThis article introduces how to use exponentiation functions in C, focusing on the `pow()` function and custom implementations. Learn to calculate positive and negative exponents effectively with clear examples and explanations. Whether you're a beginner or looking to enhance your programming skills, discover the best practices for handling exponentiation in C. #ifndef Include Guards in CThis article introduces how to use The extern Keyword in CThis article introduces the extern keyword in C, explaining its importance in managing variable scope across multiple files. Learn how to use extern with variables and functions through practical examples, enhancing your programming skills. Discover best practices for effective use of extern to promote modularity and maintainability in your C projects. The execvp Function in CThis article introduces the execvp function in C, detailing its usage for executing programs within a process. Learn how to implement execvp effectively, handle errors, and combine it with fork for optimal process management. Discover practical examples and enhance your programming skills with this comprehensive guide. The dup2 Function in CThis article explores the dup2 function in C, detailing its usage for redirecting input and output streams. Learn how to effectively implement dup2 for both standard output and input redirection with practical code examples. Gain insights into error handling and best practices to enhance your programming skills. How to Convert String to Lowercase in CThis article introduces how to convert a string to lowercase in C. Discover various methods, including using standard library functions, custom functions, and pointer arithmetic. With clear code examples and detailed explanations, you'll learn effective string manipulation techniques. Perfect for beginners and experienced programmers alike, this guide will enhance your C programming skills. How to Check if String Contains Substring in CThis article demonstrates how to check if a string contains a substring in C. Explore various methods including using the strstr function, manual search with loops, and utilizing strpbrk. Enhance your string manipulation skills with practical examples and clear explanations. Perfect for beginners and experienced programmers alike, this guide covers essential techniques for effective string handling in C programming. How to Plot Data in CThis article demonstrates how to plot data in C using various libraries and techniques. Learn to create effective visualizations with gnuplot, PLplot, and Cairo, enhancing your data analysis and presentation skills. Discover code examples and detailed explanations to make plotting in C easy and accessible. How to Use the strsep Function in CThis article introduces how to use the strsep function in C, a powerful tool for parsing strings. Learn the advantages, common pitfalls, and see clear examples of how to tokenize strings efficiently. Whether you're a beginner or an experienced programmer, mastering strsep will enhance your string manipulation skills. How to Use the strdup Function in CThis article demonstrates how to use the strdup function in C effectively. Learn about string duplication, error handling, and memory management with practical examples and explanations. Enhance your C programming skills with this comprehensive guide on strdup. How to Use the nanosleep Function in CThis article demonstrates how to effectively use the nanosleep function in C. Learn how to implement timing, handle interruptions, and create timed loops with clear examples and explanations. Perfect for developers looking to manage execution timing in their applications. How to Use the fork Function in CThis article demonstrates how to use the fork function in C, explaining its role in process creation and management. Learn to create child processes, handle termination, and ensure efficient multitasking in your applications. With clear examples and explanations, this guide is perfect for both beginners and experienced programmers looking to enhance their skills in C programming.