Pre-Processors
Those #Tag inside our program
Preprocessors in C++ are directives that are processed before the actual compilation of your code begins. They allow you to perform certain operations on your source code before it's compiled. Here's a concise overview of preprocessors in C++:
Inclusion of header files:
#include <iostream> // For standard library headers #include "myheader.h" // For your own headers
Macro definitions:
#define PI 3.14159 #define SQUARE(x) ((x) * (x))
Conditional compilation:
#ifdef DEBUG // Debug code #endif
File inclusion guards:
#ifndef MYHEADER_H #define MYHEADER_H // Header content #endif
Pragma directives:
#pragma once
These directives help with code organization, portability, and can sometimes improve performance.
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