Creating a new class for arabic to roman numeral converter displaying up to 4000 displaying the results in a two column tabular format.

Question

1.00/5 (2 votes)

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C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication2
{
    class Program
    {
        static string ToRoman(int arabic)
        {
            int[] values = new int[] { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 };
            string[] numerals = new string[] { "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" };
            string input = "";
            for (int i = 0; i < arabic; i++)
            {
                while (arabic >= 1000)
                {
                    input = input + "M";
                    arabic = arabic - 1000;
                }
                while (arabic >= 900)
                {
                    input = input + "CM";
                    arabic = arabic - 900;
                }
                while (arabic >= 500)
                {
                    input = input + "D";
                    arabic = arabic - 500;
                }
                while (arabic >= 400)
                {
                    input = input + "CD";
                    arabic = arabic - 400;
                }
                while (arabic >= 100)
                {
                    input = input + "C";
                    arabic = arabic - 100;
                }
                while (arabic >= 90)
                {
                    input = input + "XC";
                    arabic = arabic - 90;
                }
                while (arabic >= 50)
                {
                    input = input + "L";
                    arabic = arabic - 50;
                }
                while (arabic >= 40)
                {
                    input = input + "XL";
                    arabic = arabic - 40;
                }

                while (arabic >= 10)
                {
                    input = input + "X";
                    arabic = arabic - 10;
                }
                while (arabic >= 9)
                {

                    input = input + "IX";
                    arabic = arabic - 9;
                }
                while (arabic >= 5)
                {
                    input = input + "V";
                    arabic = arabic - 5;
                }
                while (arabic >= 4)
                {
                    input = input + "IV";
                    arabic = arabic - 4;
                }
                while (arabic >= 1)
                {
                    input = input + "I";
                    arabic = arabic - 1;
                }
            }
            return input;
        }
        static void Main(string[] args)
        {
            for (int NUMERAL = 0; NUMERAL <= 4000; NUMERAL++)
            {
                while (NUMERAL <= 4000)
                {
                    int x = 1;
                    while (x < 20)
                    {
                        Console.WriteLine((x + NUMERAL) + " = " + ToRoman(x + NUMERAL));
                        x = x + 1;
                    }
                    NUMERAL = x + NUMERAL;
                    Console.WriteLine(NUMERAL + " = " + ToRoman(NUMERAL));
                    Console.WriteLine("Press any key for the next 20 numbers");
                    Console.ReadKey(true);

                }
            }
        }
    }
}

Posted 11-Jul-12 14:51pm

D5927

Updated 12-Jul-12 7:27am

v4

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Comments

Sergey Alexandrovich Kryukov 11-Jul-12 21:02pm

This is not a question. If you "don't know where to begin", what does your code mean? What's the problem? You can use "improve question" above. Without proper improvement of the question, you cannot hope for help. Besides, I would recommend you to write more accurate code first. All those hard-coded 400, 500, 20, 4000, "I", "IX", especially matching to numerals are not acceptable at all.
--SA

D5927 11-Jul-12 21:04pm

i am writing this project that acts as a arabic to roman numeral converter and lists them in a console application up to 4000 i need help writing a new class which would include 2 columns instead of one and display 100 numbers instead of 20. i would like some advice as how i would be able to start the new class

lukeer 12-Jul-12 2:46am

A comment is not the proper place for such information. As Sergey Alexandrovitch Kryukov said, update your question using the "Improve question" link for that.

Besides, see my answer.

Zoltán Zörgő 12-Jul-12 3:12am

Ok, but if you want 100 numbers per page in two columns, that means 50 numbers in a column. This on other hand means, that you need to have 50 rows on the console. Otherwise pagination has no sense, since user must scroll the screen. By default you have 25 rows (and 300 as buffer), but users can set console size as they want. How will you manage this?

2 solutions

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lukeer · Answer 1 · 2012-07-11T20:46:00

Solution 2

You don't need another class. Just tweak your output a little. This completely untested code may work:

C#

for (int i = 0; i < 4000; i += 2)
{
    Console.WriteLine(i.ToString() + " = " + ToRoman(i) + "\t\t" + (i + 1).ToString() + " = " + ToRoman(i + 1));
    if (i % 100 == 0 || (i + 1) % 100 == 0)
    {
        Console.WriteLine("Press any key for the next 100 numbers");
        Console.ReadKey(true);
    }
}

Posted 11-Jul-12 20:46pm

lukeer

v2

Comments

Zoltán Zörgő 12-Jul-12 3:08am

Good suggestion, but needs some modification if data has to be presented in column flow, not in row flow.

D5927 12-Jul-12 13:25pm

good answer but my project requires for me to put in a new class. Any advice on that

**Zoltán Zörgő** · Answer 2 · 2012-07-11T20:40:00

Solution 1

As you have few items to display, use buffer array. Dimension it to have two columns and as many rows a the console has. (see: System.Console.WindowHeight[^]). Then fill the first column, then the second. When displaying, parse the array row by row.
Or you can simply use the SetCursorPosition[^] method to place the cursor on the screen, and display your data in columns.

Posted 11-Jul-12 20:40pm

Zoltán Zörgő

Updated 11-Jul-12 20:47pm

v2

Comments

Zoltán Zörgő 12-Jul-12 14:31pm

It would be fair to have a feedback on a downvote :(