When writing in C, do you often encounter these challenges? Want to implement a function to calculate the average of an arbitrary number of values but get stuck on “the number of parameters is uncertain”; After defining an array, you find that the memory is insufficient and have to redo the code; Even though the … Read more
Structure Types When learning C language, the array encountered is a type of linear list in data structures, which consists of a group of n data elements of the same type. Each data element in a linear list has exactly one direct predecessor and exactly one direct successor. Additionally, the first element has no predecessor, … Read more
When assigning values to registers using the C language, bit manipulation methods in C are often required. Clearing a Specific Bit in a Register Assuming ‘a’ represents the register, which already has a value. If we want to clear a specific bit while keeping other bits unchanged, the code is as follows. // Define a … Read more
Why Do We Need an Elegant Hierarchical State Machine? Traditional State Machine Implementation: // Traditional implementation: 4 function pointers + complex state transition logic typedef struct { void (*entry)(); void (*exit)(); void (*work)(); void (*event)(); // … more function pointers } TraditionalState; This design not only leads to code redundancy but also has a rigid … Read more
The size of a structure and its alignment directly affect memory and performance; understanding alignment rules, the reasons for padding, and the behavior of bitfields can help write smaller, more efficient, and portable C code. Memory layout of a structure Why Care About the Memory Layout of Structures • In network protocols, binary files, drivers, … Read more
The method to download the materials is at the end of the article. 51 Microcontroller Tutorial Directory 1 – Self-study Notes – Design and Verification 1 – Principles and Interface Technology of Microcontrollers. Li Quanli 2 – New MCS-51 Microcontroller Application Design 3 – A Guide to Learning CAN Bus 4 – Introduction to C … Read more
Content Hello everyone, I am Bug Jun~For C developers, functions are definitely not unfamiliar, and you could even type them out with your eyes closed. But have you categorized the functions in C language? When you write a function, do you first think about its functionality or its parameters?Today, I suggest categorizing the functions you … Read more
Counting sort is a non-comparison based sorting algorithm suitable for sorting integers, provided that the range of the elements to be sorted is known and relatively concentrated. Its core idea is to count the occurrences of each element and then reconstruct the ordered array based on these counts. Basic Steps of Counting Sort Determine the … Read more
Continuing from the previous article, we will further discuss pointers in the C language.In C, pointers and arrays are two closely related but often confused concepts. When combined, they form two powerful tools:Pointer Arrays and Array Pointers. 1. Pointer Arrays: A Tool for Managing Collections of Data 1.1 What is a Pointer Array? A pointer … Read more
To design a small program that determines whether a given year is a leap year, we must first clarify the definition and calculation method of a leap year. First, a leap year has 366 days, while a common year has 365 days. Next, we need to determine the calculation method for leap years, which has … Read more