C Programming Tutorial
C is the language that built modern computing. The Linux kernel, Python interpreter, MySQL database — all written in C. Learning it gives you a level of understanding that no other language can match.
This course takes you from your first printf to dynamic memory, file I/O, and pointer arithmetic — at a pace built for Indian board students and engineering first-years.
- GSEB / CBSE Std 10 & 12 students with C in their syllabus
- Engineering first-year students (BCA, B.Tech) learning programming fundamentals
- Anyone who wants to truly understand how a computer works under the hood
Where C is used
| Domain | Examples |
|---|---|
| Operating Systems | Linux kernel, Windows kernel, macOS core |
| Embedded Systems | Arduino, IoT devices, microcontrollers |
| Databases | MySQL, SQLite, PostgreSQL |
| Compilers & Interpreters | Python (CPython), PHP, Ruby — all built in C |
| Game Engines | Core engine layers of Unity, Unreal |
Learning Path
Follow the modules in order. Each one builds on the previous.
1. Introduction
Learn what C is, why it is still relevant in 2025, and set up your compiler (GCC on Linux/Mac, MinGW or Dev-C++ on Windows).
2. Foundations
Master variables, primitive data types (int, float, char), type casting, and all C operators including increment/decrement.
3. Control Flow
Control program execution with if-else, switch, while, for, do-while, break, and continue.
4. Functions
Write reusable functions, understand call-by-value vs call-by-reference, scope rules, and master recursion with classic examples.
5. Arrays & Strings
Store collections with 1D and 2D arrays, manipulate text with char arrays, and use string.h functions like strlen, strcpy, strcmp.
6. Pointers
The most powerful (and feared) feature of C. Learn memory addresses, * and & operators, pointer arithmetic, and pointers with arrays and functions.
7. Memory Management
Allocate memory at runtime with malloc/calloc, resize with realloc, and avoid memory leaks with free. The key skill for systems programming.
8. Structures & Unions
Group related data with struct, save memory with union, create readable names with typedef, and define constants with enum.
9. Preprocessor & Macros
Understand what happens before compilation — #include headers, #define constants and macros, conditional compilation with #ifdef/#endif.
10. File Handling
Read and write text and binary files using FILE*, fopen, fprintf, fscanf, and fclose. Essential for real-world C programs.
11. Practice Programs
100+ C programs covering GSEB Std 10/12, CBSE practicals, engineering assignments, and common technical interview questions.
Before you start
- Windows: Install Dev-C++ or MinGW + VS Code
- Linux / Mac: GCC is pre-installed — just open a terminal and type
gcc --version - Online (no install): Use onlinegdb.com/online_c_compiler to run code in your browser instantly
#include <stdio.h>
int main() {
printf("Hello, VD Computer Tuition!\n");
return 0;
}
Compile and run with: gcc hello.c -o hello && ./hello