using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Main Menu");

        Console.WriteLine("1. Set Size");

        Console.WriteLine("2. Draw Square");

        Console.WriteLine("3. Draw Triangle");

        Console.WriteLine("4. Draw Rhombus");

        Console.WriteLine("5. Exit");

        Console.WriteLine();

        Console.Write("Menu: ");

        string menu = Console.ReadLine();

        int size;

        int a = 1;

        string fill = " ";

        string menucolor;

        int shape;

        while (menu != "5")

        {

            switch (menu)

            {

                case "1":

                    Console.Write("Input Size:");

            size = Convert.ToInt16(Console.ReadLine());

            a = size;

            while (size <= 1)

            {

​

                {

                    Console.WriteLine("invalid size");

                    Console.WriteLine();

                    Console.Write("Input Size:");

                    size = Convert.ToInt16(Console.ReadLine());

                    a = size;

                }

​

            }

                Console.WriteLine();    

                    break;

                case "2":

                    Console.WriteLine();

                    //persegi

                    for (int i = 1; i <= a; i++)

                    {

                        for (int j = 1; j <= a; j++)

                        {

                            if (i == 1 || i == a || j == 1 || j == a)

                            {

                                Console.Write("*");

                                Console.Write(" ");

                            }

                            else

                            {

                                Console.Write(fill + " ");

                            }

                        }

​

                        Console.WriteLine();

                    }

​

                    Console.WriteLine();

                    break;

                case "3":

                    Console.WriteLine();

                    if (a == 1)

                    {

                        Console.WriteLine("error, silahkan set ukuran");

                    }

                    else

                    {

                        for (int i = 1; i <= a; i++)

                        {

                            //top

                            for (int k = a; k >= i; k--)

                            {

                                Console.Write(" ");

                            }

​

                            for (int j = 1; j <= i; j++)

                            {

                                if (i == 1 || i == a || j == 1 || j == i)

                                {

                                    //{

                                    Console.Write("*");

                                    Console.Write(" ");

                                }

                                else

                                {

                                    Console.Write(fill + " ");

                                }

                            }

​

                            Console.WriteLine();

                        }

                    }

​

                    Console.WriteLine();

                    break;

                case "4":

                    Console.WriteLine();

                    for (int i = 1; i <= a; i++)

                    {

                        //top

                        for (int k = a; k >= i; k--)

                        {

                            Console.Write(" ");

                        }

​

                        for (int j = 1; j <= i; j++)

                        {

                            if (i == 1 || j == 1 || j == i)

                            {

                                //{

                                Console.Write("*");

                                Console.Write(" ");

                            }

                            else

                            {

                                Console.Write(fill + " ");

                            }

                        }

​

                        Console.WriteLine();

                    }

​

                    for (int i = a - 1; i >= 1; i--)

                    {

                        for (int k = a; k >= i; k--)

                        {

                            Console.Write(" ");

                        }

​

                        for (int j = 1; j <= i; j++)

                        {

                            if (i == 1 || i == a || j == 1 || j == i)

                            {

                                Console.Write("*");

                                Console.Write(" ");

                            }

                            else

                            {

                                Console.Write(fill + " ");

                            }

                        }

​

                        Console.WriteLine();

                    }

​

                    Console.WriteLine();

                    break;

            }

​

        Console.WriteLine("Main Menu");

        Console.WriteLine("1. Set Size");

        Console.WriteLine("2. Draw Square");

        Console.WriteLine("3. Draw Triangle");

        Console.WriteLine("4. Draw Rhombus");

        Console.WriteLine("5. Exit");

        Console.WriteLine();

        Console.Write("Menu: ");

        menu = Console.ReadLine();

        }

​

        //Console.WriteLine("Thank You");

    }

}