This repository contains a comprehensive C file (leran.c) designed as a hands-on reference guide for learning the C programming language.

This guide is structured into distinct "levels" encapsulated in functions. It is split into two main files:

• leran.c: The core guide covering fundamentals (Levels 1-7).
• leran_advanced.c: A continuation covering advanced topics (Levels 8-11).

All concepts are demonstrated with clear, commented code examples.

This file covers the essential building blocks of C.

Topics Covered:

• Level 1: Variables, Data Types, printf / scanf.
• Level 2: Operators, if/else, switch, for/while loops.
• Level 3: Functions, Pointers, and Pass-by-Reference.
• Level 4: Arrays (1D, 2D, 3D), Strings, and <string.h>.
• Level 5: struct, typedef, malloc, and free.
• Level 6: File I/O (fopen, fprintf, fgets, fclose) and Function Pointers.
• Level 7: Simulating Object-Oriented Programming (OOP) in C.

This file explores more complex and specialized features of C.

Topics Covered:

• Level 8: Specialized Data Types (enum, union).
• Level 9: Preprocessor Directives (#define, #if, #ifdef) and Bitwise Operations (&, |, ^, ~, <<, >>).
• Level 10: Storage Classes (static, extern) and Command Line Arguments (argc, argv).
• Level 11: A complete data structure implementation: The Linked List.

You can clone this repository and compile the files to see the output of every example.

1. Compile:

   gcc leran.c -o leran

2. Run:
   • On Linux/Mac: ./leran
   • On Windows: leran.exe

This program is designed to accept command-line arguments.

1. Compile:

   gcc leran_advanced.c -o leran_adv

2. Run (without arguments):

   ./leran_adv

3. Run (with arguments to see the demo):

   ./leran_adv hello world 123