StringMatrixRotation

StringMatrixRotation.cs

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

namespace E12_StringMatrixRotation
{
    public class StringMatrixRotation
    {
        public static void Main()
        {
            var degrees = GetRotationDegrees();
            var matrix = GetMatrix();

            switch (degrees)
            {
                case 0: PrintMatrix(matrix); break;
                case 90: PrintMatrix90(matrix); break;
                case 180: PrintMatrix180(matrix); break;
                case 270: PrintMatrix270(matrix); break;
            }
        }

        private static void PrintMatrix270(char[][] matrix)
        {
            for (int c = matrix[0].Length - 1; c >= 0; c--)
            {
                for (int r = 0; r < matrix.Length; r++)
                {
                    Console.Write(matrix[r][c]);
                }
                Console.WriteLine();
            }
        }

        private static void PrintMatrix90(char[][] matrix)
        {
            for (int c = 0; c < matrix[0].Length; c++)
            {
                for (int r = matrix.Length - 1; r >= 0; r--)
                {
                    Console.Write(matrix[r][c]);
                }
                Console.WriteLine();
            }
        }

        private static void PrintMatrix180(char[][] matrix)
        {
            for (int r = matrix.Length - 1; r >= 0; r--)
            {
                Console.WriteLine(string.Join("", matrix[r].Reverse()));
            }
        }

        private static void PrintMatrix(char[][] matrix)
        {
            foreach (var row in matrix)
            {
                Console.WriteLine(string.Join("", row));
            }
        }

        private static char[][] GetMatrix()
        {
            var textList = new List<string>();
            while (true)
            {
                string text = Console.ReadLine();
                if (text == "END") break;

                textList.Add(text);
            }

            var rows = textList.Count();
            var cols = textList.Select(x => x.Count()).Max();
            var matrix = new char[rows][];

            for (int row = 0; row < rows; row++)
            {
                var builder = new StringBuilder(textList[row]);
                builder.Append(new String(' ', cols - textList[row].Length));
                matrix[row] = builder.ToString().ToCharArray();
            }

            return matrix;
        }

        private static int GetRotationDegrees()
        {
            var input = Console.ReadLine().Trim(); // "Rotate(degrees)"
            var degrees = int.Parse(input.Substring("Rotate(".Length, input.Length - 1 - "Rotate(".Length));
            degrees %= 360;
            while (degrees < 0)
            {
                degrees += 360;
            }
            return degrees;
        }
    }
}