Using macros can prevent errors, enhance portability, readability, and convenience. Below are some commonly used macros in mature software. Redefining some types to prevent differences in type byte sizes due to various platforms and compilers, facilitating portability: typedef unsigned char boolean; /* Boolean value type. */typedef unsigned long int uint32; /* Unsigned 32 bit value … Read more
Introduction to Template Metaprogramming in C Language Template metaprogramming is a technique that combines programming with type systems, allowing computations to be performed at compile time. This approach can make programs more flexible and efficient. In C language, although there is no direct template mechanism, we can use macros and some techniques to achieve similar … Read more
In C++ programming, a macro is a text replacement tool processed by the preprocessor, implemented through the <span>#define</span> directive. While macros can be very useful in certain scenarios, they are also controversial due to their potential side effects. This article will cover the basic syntax, common uses, drawbacks, and modern alternatives to help developers use … Read more
Macro Optimization in C Language: Reducing Code Duplication In the C language, macros are a powerful feature that allows for code replacement at compile time, enabling some automated processing. Using macros can effectively reduce code duplication and improve development efficiency. This article will introduce you to macros in C and how to use them to … Read more
Today, I will share several practical tips for embedded C programming, hoping they will be helpful to everyone. 1. Dynamic Binding and Callback Functions Callback functions can achieve dynamic binding, which can reduce coupling between layers to some extent. Many beginners may not yet understand callback functions, but they can be understood with the help … Read more
1. Basics of Macro Definition: The Essence of Text Replacement A macro is one of the core functionalities of the C language preprocessing phase, and it is essentially text replacement, expanded by the preprocessor before compilation. Basic Syntax #define macro_name replacement_text Example: #define PI 3.1415926 #define MAX(a, b) ((a) > (b) ? (a) : (b)) … Read more
In-depth analysis<span>function()</span> and <span>macro()</span> differences, mastering variable arguments and cross-platform compilation practical applications. 1. <span><span>function()</span></span> and <span><span>macro()</span></span> essential differences 1.1 Scope and Variable Passing <span>function()</span>: Local Scope: Variables (including parameters) defined inside the function are only valid within the function and are not visible externally. Parameter Passing: Passed by value, modifications to parameters within the … Read more
When compiling a large project, there are often many target files, library files, header files, and the final executable file. There are dependencies between different files. For example, when we compile using the following commands: $gcc -c -o test.o test.c $gcc -o helloworld test.o The executable file helloworld depends on test.o for compilation, while test.o … Read more
Word Count: 2000 Practicality Index: ⭐⭐⭐⭐⭐ 01 Macro Print Function In our embedded development, using printf to print some information is a common debugging method. However, when the amount of printed information is large, it can be difficult to know which information is printed in which function. Especially for printing exceptions, we need to quickly … Read more
Many excellent codes utilize preprocessor directives to enhance their functionality. Today, we will discuss the content related to preprocessor directives. The common preprocessing directives are as follows: # directive, has no effect #include includes a source code file #define defines a macro #undef undefines a macro #if if the given condition is true, compile the … Read more