Introduction to C++ Standard Library

In C++ programming, the C++ Standard Library is a powerful resource that provides a collection of pre-defined classes and functions. It is an integral part of C++ and provides a variety of functionality for building applications.

The C++ Standard Library includes different components, such as containers, algorithms, iterators, strings, streams, and more. These components are organized into different header files that you can include in your program to access their functionalities.

One of the key benefits of using the C++ Standard Library is that it enables you to write code that is portable across different platforms and operating systems. This means that your code can be compiled and run on various systems without modification, as long as they support the C++ Standard Library.

Let's take a look at a simple example that demonstrates the usage of a container from the C++ Standard Library:

1#include <iostream>
2#include <vector>
3
4int main() {
5    std::vector<int> numbers = {1, 2, 3, 4, 5};
6
7    std::cout << "Numbers: ";
8    for (int n : numbers) {
9        std::cout << n << " ";
10    }
11    std::cout << std::endl;
12
13    return 0;
14}

In this example, we include the <iostream> and <vector> header files to access the functionalities of the std::vector container. We initialize a vector numbers with some values and then use a loop to print each number.

The output of this program will be:

1Numbers: 1 2 3 4 5

This simple example demonstrates the ease of use and power of the C++ Standard Library. Throughout this course, we will explore various components of the C++ Standard Library and learn how to leverage its functionalities in our programs.

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#include <iostream>

#include <vector>

​

int main() {

    std::vector<int> numbers = {1, 2, 3, 4, 5};

​

    std::cout << "Numbers: ";

    for (int n : numbers) {

        std::cout << n << " ";

    }

    std::cout << std::endl;

​

    return 0;

}