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_6

6. Exercises

Slobodan Dmitrović¹  

(1)

Belgrade, Serbia

 

Hello World and Comments

Write a program that has a comment in it and outputs “Hello World.” on one line and “C++ rocks!” on a new line.

#include <iostream>

int main()

{

    // this is a comment

    std::cout << "Hello World." << '\n';

    std::cout << "C++ rocks!";

}

Output:

Hello World.

C++ rocks!

Declaration

Write a program that declares three variables inside the main function. Variables are of types char, int, and double. The names of the variables are arbitrary. Since we do not use any input or output, we do not need to ...