C++ (ISO)

Sure! Here is an example that demonstrates the use of the C++ programming language:

#include <iostream>

int main() {
    int num1, num2, sum;

    std::cout << "Enter two numbers: ";
    std::cin >> num1 >> num2;

    sum = num1 + num2;

    std::cout << "The sum is: " << sum << std::endl;

    return 0;
}

Explanation:

Step 1:

The first line #include <iostream> is a preprocessor directive that tells the compiler to include the iostream header file. This file contains the necessary functions for input and output operations.

Step 2:

The main() function is the entry point of the program. It is where the execution of the program starts. In this example, the main() function is defined with a return type of int to indicate that it returns an integer value.

Step 3:

Inside the main() function, three integer variables num1, num2, and sum are declared. These variables will be used to store the user input and the sum of the two numbers.

Step 4:

The std::cout statement is used to display the text "Enter two numbers: " on the console. std::cout is an object of the std::ostream class that represents the standard output stream. The << operator is used to insert the text into the output stream.

Step 5:

The std::cin statement is used to read the user input from the console. std::cin is an object of the std::istream class that represents the standard input stream. The >> operator is used to extract the input from the stream and store it in the variables num1 and num2.

Step 6:

The next line calculates the sum of num1 and num2 and assigns it to the sum variable.

Step 7:

The std::cout statement is used to display the text "The sum is: " followed by the value of sum on the console.

Step 8:

The std::endl manipulator is used to insert a new line character into the output stream. This is done to ensure that the output is displayed on a new line.

Step 9:

The return 0; statement is used to indicate the successful execution of the program. The value 0 is returned to the operating system to indicate that the program terminated successfully.

This is a simple example that demonstrates the basic structure and syntax of a C++ program. It takes two numbers as input from the user, calculates their sum, and displays the result on the console.