C#•12mo ago

Adding red, green, and blue pixels into a list after being red form the input file

using System;
using System.IO;
using System.Collections.Generic;

namespace Module_12
{
    
    public class Program
    {
        static void Main(string[] args)
        {
            // Open the input and output file.
            FileStream inputFile = new("ScrambledFlag.ppm", FileMode.Open, FileAccess.Read);
            StreamReader reader = new(inputFile);
            FileStream outputFile = new("UnscrambledFlag.ppm", FileMode.Create, FileAccess.Write);
            StreamWriter writer = new(outputFile);

            //read header of input file
            while (!reader.EndOfStream)
            {
                
                string? nextLine = reader.ReadLine();

                if ( nextLine != null )
                {
                    string[] nextItem = nextLine.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
                    if (nextItem.Length == 0) { continue; }

                    //reading header and converting to int
                    string? p = reader.ReadLine();
                    int x = Convert.ToInt32(nextItem[0]);
                    int y = Convert.ToInt32(nextItem[1]);
                    int z = Convert.ToInt32(reader.ReadLine());

                    List<Pixel> pixels = new List<Pixel>(x * y);

                    for (int i = 0; i < pixels.Count; i++)
                    {
                        int first;
                        int second;
                        int third;


                        pixels.Add();
                    }



                    //writing header to output file
                    //write header to output file
                    writer.WriteLine(p);
                }
            }
            
        }
    }
}

using System;
using System.IO;
using System.Collections.Generic;

namespace Module_12
{
    
    public class Program
    {
        static void Main(string[] args)
        {
            // Open the input and output file.
            FileStream inputFile = new("ScrambledFlag.ppm", FileMode.Open, FileAccess.Read);
            StreamReader reader = new(inputFile);
            FileStream outputFile = new("UnscrambledFlag.ppm", FileMode.Create, FileAccess.Write);
            StreamWriter writer = new(outputFile);

            //read header of input file
            while (!reader.EndOfStream)
            {
                
                string? nextLine = reader.ReadLine();

                if ( nextLine != null )
                {
                    string[] nextItem = nextLine.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
                    if (nextItem.Length == 0) { continue; }

                    //reading header and converting to int
                    string? p = reader.ReadLine();
                    int x = Convert.ToInt32(nextItem[0]);
                    int y = Convert.ToInt32(nextItem[1]);
                    int z = Convert.ToInt32(reader.ReadLine());

                    List<Pixel> pixels = new List<Pixel>(x * y);

                    for (int i = 0; i < pixels.Count; i++)
                    {
                        int first;
                        int second;
                        int third;


                        pixels.Add();
                    }



                    //writing header to output file
                    //write header to output file
                    writer.WriteLine(p);
                }
            }
            
        }
    }
}

3 Replies

DinnyOP•12mo ago

my issue lies at the for loop

Kao•12mo ago

Well you need to tell a bit more about the issues you have Do you have an error? Is the behaviour different from your expectations? If yes tell us about both. Etc

DinnyOP•12mo ago

there is no error, but i am unsure how to proceed. mt ptof states that we must "Create a list of pixels (type List<Pixel>) to store the pixels read from the input file" and "Using the constructor in the Pixel class, read in all the pixels from the input image and add them into the list." my prof** my idea was to create three different variable to store the red, green, and blue pixels (the input file is a list of numbers, but i must take three at a time to get a pixel color to put in the poutput file) in the input file, the first three numbers equal to a color btw (either red, gree, or blue"

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Adding red, green, and blue pixels into a list after being red form the input file