Modern C++ for Absolute Beginners: A Friendly Introduction to the C++ Programming Language and C++11 to C++23 Standards

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2023

S. DmitrovićModern C++ for Absolute Beginnershttps://doi.org/10.1007/978-1-4842-9274-7_8

8. Standard Input

Slobodan Dmitrović¹  

(1)

Belgrade, Serbia

 

C++ provides facilities for accepting input from a user. We can think of the standard input as our keyboard. A simple example of accepting one integer number and printing it out is

#include <iostream>

int main()

{

    std::cout << "Please enter a number and press enter: ";

    int x = 0;

    std::cin >> x;

    std::cout << "You entered: " << x;

}

Possible Output:

Please enter a number and press enter: 123

You entered: 123

The std::cin is the standard input stream, and it uses the stream extraction >> operator to extract what ...