C++ Programming Language – A Detailed Overview

 C++ is a effective, high-overall performance programming language advanced as an extension of the C language. Created via Bjarne Stroustrup at Bell Labs in the early Eighties, C++ delivered object-orientated features to the procedural shape of C, making it appropriate for large-scale software program development. Over the years, it has emerge as a extensively used language for machine/software program improvement, game programming, embedded systems, real-time simulations, and extra.

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C++ combines the efficiency and manage of C with functions like classes, items, inheritance, and polymorphism, permitting builders to construct complex, scalable programs.

2. Key Features of C++

Object-Oriented: C++ supports object-orientated programming (OOP), which include encapsulation, inheritance, and polymorphism.

Compiled Language: Programs are compiled to machine code for overall performance and portability.

Platform Independent (with Compiler Support): Though not inherently platform-unbiased, C++ programs can run on a couple of structures when compiled therefore.

Low-Level Manipulation: Like C, C++ permits direct reminiscence get right of entry to thru suggestions.

Standard Template Library (STL): C++ consists of powerful libraries for facts systems and algorithms.

Rich Functionality: Supports functions like feature overloading, operator overloading, templates, and exception dealing with.

3. Structure of a C++ Program

Here’s a primary C++ program:

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#encompass <iostream>

the use of namespace std;

int important() 

    cout << "Hello, World!" << endl;

    return zero;

Explanation:

#encompass <iostream> consists of the enter/output stream library.

Using namespace std; allows using standard capabilities like cout without prefixing std::.

Foremost() is the access point of every C++ program.

Cout prints textual content to the console.

Four. Data Types and Variables

C++ has both primitive and user-defined statistics types. Examples:

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int a = 10;

glide b = 3.14;

char c = 'A';

bool isReady = true;

Modifiers like short, lengthy, signed, and unsigned extend the information sorts’ range.

5. Operators

C++ supports, !

Assignment Operators: =, +=, -=, and many others.

Increment/Decrement: ++, --

Bitwise Operators: &, 

    cout << "a is greater";

 else 

    cout << "b is extra";

Switch Case:

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transfer (desire) 

    case 1: cout << "One"; ruin;

    case 2: cout << "Two"; smash;

    default: cout << "Other";

Loops:

For Loop:

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for (int i = zero; i < five; i++) 

    cout << i << " ";

While Loop:

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int i = 0;

at the same time as (i < five) 

    cout << i << " ";

    i++;

Do-While Loop:

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int i = zero;

do 

 cout << i << " ";

    i++;

 whilst (i < 5);

7. Functions

Functions in C++ growth modularity and reusability.

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int upload(int a, int b) 

    go back a + b;

int major() 

    cout << upload(three, 4);

    return 0;

Functions may be overloaded via defining multiple variations with special parameters.

Eight. Object-Oriented Programming (OOP)

OOP is a chief energy of C++. It makes use of instructions and objects to represent real-international entities.

Class and Object Example:

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magnificence Car 

public:

    string logo;

    int pace;

void display() 

        cout << brand << " velocity: " << pace << " km/h" << endl;

    int main() 

    Car myCar;

    myCar.Emblem = "Toyota";

    myCar.Pace = 120;

    myCar.Show();

    go back zero;

9. OOP Principles

1. Encapsulation:

Binding facts and features into a unmarried unit (elegance) and proscribing get admission to the usage of private, public, or blanketed.

2. Inheritance:

Allows one magnificence to inherit properties from another.

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elegance Animal 

public:

    void talk()  cout << "Animal sound" << endl; 

;

class Dog : public Animal 

public:

    void bark()  cout << "Dog barks" << endl; 

; three. Polymorphism:

Same characteristic behaves in a different way primarily based at the item or input.

Function Overloading: Same feature name, special parameters.

Function Overriding: Redefining base magnificence method in derived magnificence.

Four. Abstraction:

Hiding complicated information and showing handiest vital capabilities the usage of training and interfaces (abstract training).

10. Constructors and Destructors

Constructor: Special approach known as while an item is created.

Destructor: Called whilst an item is destroyed.

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magnificence Demo 

public:

    Demo() 

        cout << "Constructor calledn";

    ~Demo() 

        cout << "Destructor calledn";

    ;

11. Pointers and Dynamic Memory

C++ supports tips like C, and dynamic memory with new and delete.

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int* ptr = new int;   // allocate reminiscence

*ptr = 5;

delete ptr;           // deallocate memory

12. Arrays and Strings

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int nums[5] = 1, 2, three, 4, 5;

cout << nums[2];  // prints 3

string name = "Alice";

cout << call.Period();

C++ also supports STL boxes like vector, map, set, and many others.

Thirteen. Standard Template Library (STL)

STL offers established training and features:

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#consist of <vector>

#consist of <iostream>

using namespace std;

int important() 

    vector<int> v = 1, 2, 3;

    v.Push_back(four);

    for (int i : v)

        cout << i << " ";

STL includes:

Containers: vector, list, set, map

Algorithms: sort, discover, rely

Iterators: for traversing containers

14. Exception Handling

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attempt 

    int a = 10, b = 0;

    if (b == zero) throw "Division by means of 0!";

    cout << a / b;

 seize (const char* msg) 

    cout << "Error: " << msg;

Use attempt, capture, and throw for managing runtime errors.

15. File Handling

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#consist of <fstream>

ofstream out("information.Txt");

out << "Hello File";

out.Near();

ifstream in("records.Txt");

string line;

getline(in, line);

cout << line;

in.Near();

File I/O is achieved the usage of ifstream, ofstream, and fstream.

16. Applications of C++

Game Development: Unreal Engine is primarily based on C++.

System Software: Operating systems, compilers.

GUI Applications: Desktop software (e.G., Adobe merchandise).

Embedded Systems: Hardware-level applications.

Banking and Finance Software: High-speed buying and selling systems.

Real-Time Systems: Simulations, robotics, and so on.

17. Advantages of C++

Fast and efficient

Wide range of libraries

Suitable for each high-level and low-level programming

Strong item-orientated aid

Multi-paradigm: procedural + object-oriented

18. Limitations of C++

Manual reminiscence management can lead to mistakes

Lacks contemporary protection functions (in contrast to Java or Python)

Steeper studying curve for beginners

No built-in rubbish series

19. Modern C++ (C++11/14/17/20/23)

Modern C++ variations introduced capabilities like:

Smart recommendations (shared_ptr, unique_ptr)

Lambda expressions

Range-based totally for loops

car kind deduction

Multithreading support

Example:

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vector<int> v = 1, 2, three;

for (auto x : v) 

    cout << x << " ";

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