C# Exercise: 121 Function return value for Main

// Importing necessary namespaces
using System;

class Program
{
    // Main method to drive the program
    public static void Main(string[] args)
    {
        // Check if any argument is passed (i.e., a title)
        if (args.Length == 0)
        {
            // If no argument is provided, show an error message and return 1
            Console.WriteLine("Error: No title specified.");
            Environment.Exit(1); // Return 1 to the operating system
        }
        else
        {
            // If an argument is provided, call the WriteTitle function with the user's title
            string title = string.Join(" ", args); // Join the arguments if there are multiple words
            WriteTitle(title); // Display the title
        }
    }

    // Function to write the title with lines above and below
    public static void WriteTitle(string text)
    {
        // Defining the screen width (80 columns)
        int screenWidth = 80;

        // Convert the text to uppercase and add extra spaces between each character
        string upperText = string.Join(" ", text.ToUpper().ToCharArray());

        // Calculate the number of hyphens needed for the lines
        int totalLength = upperText.Length + 4; // 2 extra spaces for padding on each side
        int hyphenCount = (screenWidth - totalLength) / 2;

        // Create the line of hyphens
        string hyphens = new string('-', hyphenCount);

        // Display the line above the text
        Console.WriteLine(hyphens);

        // Display the text centered
        Console.WriteLine($"{hyphens} {upperText} {hyphens}");

        // Display the line below the text
        Console.WriteLine(hyphens);
    }
}