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C++ Online 
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C++ is a middle-level programming language developed by 
Bjarne Stroustrup starting in 1979 at Bell Labs. C++ runs on 
a variety of platforms, such as Windows, Mac OS, and the 
various versions of UNIX. This C++ tutorial adopts a simple 
and practical approach to describe the concepts of C++ for 
beginners to advanded software engineers.
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C++ Online 
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Why to Learn C++
C++ is a MUST for students and working professionals to become a great Software 
Engineer. I will list down some of the key advantages of learning C++:
C++ is very close to hardware, so you get a chance to work at a low level which 
gives you lot of control in terms of memory management, better performance and 
finally a robust software development.
C++ programming gives you a clear understanding about Object Oriented 
Programming. You will understand low level implementation of polymorphism when 
you will implement virtual tables and virtual table pointers, or dynamic type 
identification.
C++ is one of the every green programming languages and loved by millions of 
software developers. If you are a great C++ programmer then you will never sit 
without work and more importantly you will get highly paid for your work.
C++ is the most widely used programming languages in application and system 
programming. So you can choose your area of interest of software development.
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Applications of C++ Programming
As mentioned before, C++ is one of the most widely used programming languages. It has it's 
presence in almost every area of software development. I'm going to list few of them here:
Application Software Development - C++ programming has been used in developing almost 
all the major Operating Systems like Windows, Mac OSX and Linux. Apart from the operating 
systems, the core part of many browsers like Mozilla Firefox and Chrome have been written 
using C++. C++ also has been used in developing the most popular database system called 
MySQL.
Programming Languages Development - C++ has been used extensively in developing new 
programming languages like C#, Java, JavaScript, Perl, UNIX’s C Shell, PHP and Python, and 
Verilog etc.
Computation Programming - C++ is the best friends of scientists because of fast speed and 
computational efficiencies.
Games Development - C++ is extremely fast which allows programmers to do procedural 
programming for CPU intensive functions and provides greater control over hardware, because 
of which it has been widely used in development of gaming engines.
Embedded System - C++ is being heavily used in developing Medical and Engineering 4
A+p9p1li c9a3t5i6o9n1s3 8l4ik9e softwares for MRI machines, high-end CAD/CAM systeminsf [email protected]
C++ Online 
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Object-Oriented Programming
C++ fully supports object-oriented programming, including the four pillars of object-
oriented development −
Encapsulation
Data hiding
Inheritance
Polymorphism
Standard Libraries
Standard C++ consists of three important parts −
The core language giving all the building blocks including variables, data types and 
literals, etc.
The C++ Standard Library giving a rich set of functions manipulating files, strings, etc.
The Standard Template Library (STL) giving a rich set of methods manipulating data 
structures, etc.
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Learning C++
The most important thing while learning C++ is to focus on concepts.
The purpose of learning a programming language is to become a better programmer; 
that is, to become more effective at designing and implementing new systems and at 
maintaining old ones.
C++ supports a variety of programming styles. You can write in the style of Fortran, C, 
Smalltalk, etc., in any language. Each style can achieve its aims effectively while 
maintaining runtime and space efficiency.
Use of C++
C++ is used by hundreds of thousands of programmers in essentially every application 
domain.
C++ is being highly used to write device drivers and other software that rely on direct 
manipulation of hardware under realtime constraints.
C++ is widely used for teaching and research because it is clean enough for successful 
teaching of basic concepts. 6
Anyone who has used either an Apple Macintosh or a PC running Windoinwfso @harsh sinodfitrteeccthly. cuosmed 
C++9+1  b9e35c6a9u1s38e4 t9he primary user interfaces of these systems are written in C++.
C++ Online 
training
C++ Features
C++ is object oriented programming language. It provides a lot 
of features that are given below.
1. Simple 7. Fast Speed
2. Machine Independent or Portabl8e. Pointers
3. Mid-level programming languag9e. Recursion
4. Structured programming langua1g0e. Extensible
5. Rich Library 11. Object Oriented
6. Memory Management 12. Compiler based
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C++ Functions
The function in C++ language is also known as procedure or subroutine in other programming 
languages.
To perform any task, we can create function. A function can be called many times. It provides 
modularity and code reusability.
Advantage of functions in C
There are many advantages of functions.
1) Code Reusability
By creating functions in C++, you can call it many times. So we don't need to write the same code 
again and again.
2) Code optimization
It makes the code optimized, we don't need to write much code.
Suppose, you have to check 3 numbers (531, 883 and 781) whether it is prime number or not. Without 
using function, you need to write the prime number logic 3 times. So, there is repetition of code.
But if you use functions, you need to write the logic only once and you can reuse it several times. Types 
of Functions
There are two types of functions in C programming: 8
1. Library Functions: are the functions which are declared in the C++ heaindefor @filrehss soufcthte acsh c.eciol(mx), 
co+s9(x1) ,9 e35x6p9(1x3)8, 4e9tc.
2. User-defined functions: are the functions which are created by the C++ programmer, so that 
he/she can use it many times. It reduces complexity of a big program and optimizes the code.
C++ Online 
training
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