🟢 Foundation · Lesson 01

Introduction to C++

What is Introduction to C++?

Introduction to C++
C++ is a powerful general-purpose programming language used for system software, games, desktop applications, competitive programming, embedded systems and high-performance applications. It supports both procedural programming and object-oriented programming.

Level
🟢 Beginner – C++ Foundation

Example File
cpp-introduction.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
compiler	Introduction to C++ programming में Compiler use होता है।
source code	Introduction to C++ programming में Source code use होता है।
object-oriented programming	Object-Introduction to C++ programming में oriented programming use होता है।
standard library	Introduction to C++ programming में Standard library use होता है।

Syntax / Pattern

C++

A C++ program is written in a .cpp file, compiled by a compiler, and then executed as a program.

Example Program

main.cpp

#include <iostream>
using namespace std;

int main() {
    cout << "Welcome to C++";
    return 0;
}

Expected Output

Welcome to C++

Program Explanation

#include <iostream> adds input-output support.
main() is the starting point of execution.
cout prints output on the screen.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

system software
games
competitive programming
data structures
object-oriented projects

Common Mistakes

Thinking C++ is only C with classes.
Ignoring compilation errors.
Writing code without understanding main().

Practice Tasks

Write a program that prints your name and class.
List five real-life applications of C++.
Explain why C++ is called a compiled language.

Summary

Introduction to C++ एक ज़रूरी C++ topic है। परिभाषा सीखें, syntax समझें, example program चलाएं और फिर practice tasks हल करके concept मज़बूत करें।