Ancho Y Alto De PCX - Ejercicio De Programacion C# Sharp

// Import the necessary namespaces for file handling and basic input/output operations
using System;  
using System.IO;  

// Declare the main Program class
class Program
{
    // Main method where the program starts
    static void Main()
    {
        // Specify the path to the PCX image file
        string filePath = "image.pcx";  // Replace this with the path to your PCX file

        // Check if the file is a PCX image and display its width and height
        try
        {
            // Open the PCX file using a BinaryReader to read the raw bytes
            using (BinaryReader reader = new BinaryReader(File.Open(filePath, FileMode.Open)))
            {
                // Read the first byte (ID), which must be 10 for a valid PCX file
                byte id = reader.ReadByte();  
                if (id != 10)  // Check if the ID is 10, which is required for PCX format
                {
                    Console.WriteLine("This is not a valid PCX file.");
                    return;  // Exit the program if the ID is not correct
                }

                // Skip the next 3 bytes (Version, Encoding, and Bits per Pixel) since we're not using them here
                reader.BaseStream.Seek(3, SeekOrigin.Current);  

                // Read the coordinates (Xmin, Ymin, Xmax, Ymax) from position 4
                reader.BaseStream.Seek(4, SeekOrigin.Begin);  
                ushort xmin = reader.ReadUInt16();  // Read Xmin (2 bytes)
                ushort ymin = reader.ReadUInt16();  // Read Ymin (2 bytes)
                ushort xmax = reader.ReadUInt16();  // Read Xmax (2 bytes)
                ushort ymax = reader.ReadUInt16();  // Read Ymax (2 bytes)

                // Calculate the width and height of the image
                int width = xmax - xmin + 1;  // Width = Xmax - Xmin + 1
                int height = ymax - ymin + 1;  // Height = Ymax - Ymin + 1

                // Print the width and height of the PCX image
                Console.WriteLine($"PCX Image Width: {width} pixels");
                Console.WriteLine($"PCX Image Height: {height} pixels");
            }
        }
        catch (Exception ex)  // Catch any errors that may occur during file reading
        {
            // Print the error message to the console
            Console.WriteLine($"Error reading the file: {ex.Message}");
        }
    }
}

 Salida

A PCX file called image.pcx with the following structure (simplified for illustration):

The first byte is 10, indicating it’s a PCX file.
After skipping some bytes (for version, encoding, etc.), we read the coordinates xmin, ymin, xmax, ymax to calculate the image dimensions.

The program will read this file and print the following output:
PCX Image Width: 200 pixels
PCX Image Height: 150 pixels

Example Error Handling:
Error reading the file: The system cannot find the file specified.