The compiler transforms Your code before compilation transformed before compilation by the compiler using a small processor called the C preprocessor.

Because it enables the addition of macros, it is known for being a micro preprocessor.

In the context of the C programming language, the term “processor” usually refers to the central processing unit (CPU) of a computer system. The CPU is responsible for executing instructions and performing calculations.

C provides features and constructs to interact with the processor and control its behavior. Here are a few aspects related to processors in C programming:

1. Data Types: C allows you to define variables with specific data types that are compatible with the underlying processor architecture. For example, you can use data types such as int, float, double, char, etc., to represent different kinds of data and utilize the processor’s native word size and data formats.
2. Pointers: Pointers in C allow you to work with memory addresses directly. You can use pointers to access and manipulate data in memory, which can be especially useful when dealing with processor registers or specific memory locations.
3. Bitwise Operations: C provides bitwise operators like AND (&), OR (|), XOR (^), bit shifting (<<, >>), and complement (~) to perform low-level bit manipulation. These operations can be useful when you need to work with individual bits within variables, flags, or specific processor registers.
4. Assembly Language Integration: C supports inline assembly, which allows you to embed assembly language code directly within your C program. This feature enables you to write processor-specific instructions or take advantage of specific CPU features not directly exposed by the C language.
5. Compiler Optimization: C compilers often have various optimization options that can generate efficient machine code for the target processor. These optimizations can include instruction reordering, loop unrolling, function inlining, and more, resulting in faster and more optimized code execution.

It’s important to note that while C provides low-level constructs to interact with the processor, the portability of C code across different processor architectures might be limited. Code that relies heavily on processor-specific features or assumptions may not work correctly or efficiently on different systems.

We can consider a preprocessor as a compilation process, which runs when the developer runs the program. It is a pre-process of execution of a program using c/c++ language. To initialize a process of preprocessor commands, it’s mandated to define with a hash symbol

Preprocessors may be thought of as compilation processes that start when a developer launches the programme. It is a step before a programme written in the C or C++ language is executed. It is required to specify a preprocessor command with a hash symbol (#) to start the procedure.

The C preprocessor is a micro processor that is used by compiler to transform your code before compilation. It is called micro preprocessor because it allows us to add macros.