Learn C++ STL (Standard Template Library): Ultimate Guide

Safalta Expert Published by: Priya Bawa Updated Sun, 04 Dec 2022 02:14 AM IST

C++ is an overall and versatile programming language, which necessitates the use of a library to support it. C++ STL (standard template library) is a C++ software library that offers a collection of templates defining containers, algorithms, iterators, and function objects. Boost your Skills by learning: Digital Marketing

Table of Content:
1) What exactly is C++?
2) What exactly is C++ STL?
3) Advantages of C++ Standard Template Library
4) What is the Purpose of C++?

 
What exactly is C++?
C++ is an object-oriented, general-purpose programming language. Bjarne Stroustrup developed it at Bell Labs in 1980. C++ is sufficiently similar to C that it will very certainly compile over 99% of C programs without modifying a single line of source code. C++, on the other hand, is a far more well-structured and secure language than C since it is based on OOPs.
Some computer languages are designed with a specific purpose in mind.

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Source: Safalta

Java, for example, was originally designed to operate toasters and other electrical devices. However, C++ is a general-purpose programming language. It fully justifies the well-known moniker "Swiss Pocket Knife of Languages."

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What exactly is C++ STL?
The C++ STL is a collection of algorithms and data structures that we commonly encounter when developing. For example, if you wanted to utilize a linked list to solve an issue, will you develop one from scratch? No, you will utilize the list built into the C++ STL library.
Iterators
Iterators are utilized to navigate to STL container memory locations. They are generally employed in numerical, character, and other sequences. They lower the program's complexity and execution time.
Containers
Containers, often known as container classes, are used to store objects including data. The following are some container classes: vector,  list,  forward list,  queue, priority queue,  stack, set,  multiset,  map,  multimap, and an unordered set.
 
Functors
The STL offers classes that provide function call operator overloading. Function objects and functors are instances of such classes.
 
Algorithm
A finite collection of sequential phases that serves as a roadmap to solving any problem. In computer science, this C++ algorithm term is used to express the technique for addressing complicated problems. For various algorithms, the solution architecture may change. In comparison to other algorithmic solutions, the most efficient algorithm is one that offers the answer in less time and consumes less memory. The functions meant to work on number ranges are contained in the C++ header algorithm>. These functions perform operations on numbers but do not alter the data. It only functions while iterating and pointing to numbers, and it never touches its data.
 
Advantages of C++ Standard Template Library:
1. It provides several structures that I can simply create on my own
2. It has various functions such as sort, hash-table, and binary tree, but the implementations are typically not very optimized and not very excellent in terms of speed; I can simply locate a substitute or create my own with higher, often considerably better, efficiency.
 3. It makes extensive use of C++ structures/wrappers/grammars, which took a substantial amount of effort for me to understand and master.
So, can I claim that STL is only useful for high-productivity programming when there are a lot of programmers involved in the project and they want a consistent programming interface, and therefore I shouldn't bother with it for my applications?
 
What is the Purpose of C++?
C++ is a programming and coding language. C++ is used to create browsers, operating systems, and apps, in addition to in-game development, software engineering, data structures, and other tasks.
 
Making a film
C++ is used to produce many of the visuals and special effects were seen in movies. C++ is ideal for this function as it can handle big files containing high-quality film and do many of the complicated computations required to create special effects.
 
Game creation
C++ is a computer language that is commonly utilized in game creation. It has been used to build games such as World of Warcraft, Counter-Strike, and StarCraft, as well as game engines including Unreal Engine and game systems such as the Nintendo Switch, PlayStation, and Xbox.
 
Graphics:
C++ is widely utilized in nearly all multimedia applications requiring rapid rendering, computer vision, real-time physics, and portable sensors.
 
Financial instruments
Many banks and financial organizations utilize C++ to create their cloud platform, which drives banking, trading, and financial modeling applications. C++'s speed and dependability make it perfect for handling millions of daily transactions, supporting high volume and regularity of trades, and building data simulators for huge portfolios.
 
Internet browsers
Web browsers such as Mozilla Firefox, Google Chrome, Opera, and Safari, and use C++. It's used to create back-end services that get data from databases and convert code into interactive online pages. C++ enables web browsers to do these operations quickly and with low lag, which means we don't have to wait long for content to show on our screens.
 
Nearer to Hardware
C++ is a more hardware-oriented programming language than that other high-level programming languages. This makes it particularly effective in situations where software and hardware are inextricably linked and low-level software assistance is required.
 
  C++ is a general-purpose and adaptable programming language that requires the usage of a library to support it. The C++ STL (standard template library) is a C++ software library that contains templates for defining containers, algorithms, iterators, and function objects.

What is the distinction between the STL and the C++ Standard Library?

STL is an independent of the C++ standard library created by Alexander Stepanov. However, certain C++ standard library components contain STL elements such as vectors and lists, as well as techniques such as copy and swap.

In CPP, how could I learn STL?

Check out GeeksforGeeks' C++ STL Online Course to learn C++ Standard Template Library (STL) in even the most efficient way possible. The course covers the fundamentals of C++ as well as in-depth explanations of all C++ STL containers, iterators, and so on, as well as video explanations of a few difficulties. 09

Is it beneficial to understand STL in C++?

C++ STL has a number of data structures that are helpful in a variety of situations. Many data structures are inspired by real-world applications. It consists of a collection of container classes, algorithms, and iterators.

When should I start learning STL in C++?

In my opinion, the STL should be studied from the start. Many books and tutorials teach C++ backwards, starting with simple pointer ideas and progressing to more sophisticated concepts towards the end.

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