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