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
👆 Click the blue text "Linux Armory" at the top, and select "Add to Favorites" in the upper right corner Don’t miss out on great articles, see valuable content first 👆 FollowLinux Armory, to receive hardcore Linux learning materials and code unset1. Macro Expansion Rulesunsetunset In the C language preprocessor, if a macro parameter itself … Read more
Compiler Theory Interview: Interview Questions on Preprocessor and Compiler in C Language In the study and use of the C language, the compilation process is a crucial concept. This article will detail the preprocessor and compiler in C language, and present some related interview questions and their answers to help foundational users better understand this … Read more
In the world of Python, there are many libraries that can help us accomplish various tasks, among which the ligament-scss library is specifically designed for handling SCSS (Syntactically Correct CSS). SCSS is a CSS preprocessor that allows developers to write more efficient and maintainable stylesheets using features like variables, nesting, and mixins. The ligament-scss library … Read more
What Is Compilation? Compilation is the process of converting source code into target code. It is accomplished with the help of a compiler. The compiler checks the source code for syntax or structural errors, and if there are no errors, it generates the target code. The Compilation Process of C Language The compilation process of … Read more
◆Key Point 1: Method to Swap Two Variable Values 1) Using a third variable (the easiest method) 2) Using addition and subtraction to swap values (commonly used in interviews **) The code is as follows: b = a – b; a = a – b; b = a + b; 3) Using bitwise XOR to … Read more
Special Preprocessor Directives #error Directive The #error directive allows the preprocessor to output an error message during the compilation process and stop compilation. This is very useful for forcing developers to check the code when certain conditions are not met. For example: #include <iostream> #define USE_FEATURE_X 0 int main() { #if USE_FEATURE_X // Code using … Read more
The ## operator in C++ macros is known as the token pasting or token concatenation operator. It is used within macro definitions to concatenate two tokens into a single token when the macro is expanded. This operator is particularly useful for creating variable names, function names, or other identifiers dynamically during preprocessing. Syntax #define CONCATENATE(token1, … Read more
Advanced Preprocessor in C Language Welcome to today’s C language class. The topic we are going to discuss is – the advanced preprocessor in C language. When you hear the word “preprocessor”, do you find it a bit difficult to understand? In fact, the preprocessor is like a “behind-the-scenes director”. Before the compiler comes into … Read more
Click on the above “Hundred Questions Technology”, select “Pin to Public Account” Embedded essentials delivered promptly Some students suggested that we post more interview questions to help them prepare, so here it is. Reprinted fromCU Technology Community, original title: Classic Review: 16 Embedded C Language Interview Questions I have cut quite a bit from the … Read more