using System;

​

public class Program

{

    public static void Main()

    {

        int toppings = 20;

        int shape = 8;

        double area = 0.0;

        double price = 0.0;

        string title = "";

        string gender = "";

        string name = "";

        gender = "default";

        string pizzaShape = "";

​

        while (shape < 1 || shape > 3)

        {

            Console.Write("Enter the shape of your pizza [1]Circle [2]Square [3]Triangle ");

            shape = int.Parse(Console.ReadLine());

​

            switch (shape)

            {

                case 1:

                    Console.Write("Enter radius: ");

                    int radius = int.Parse(Console.ReadLine());

                    area = Math.PI * Math.Pow(radius, 2);

                    pizzaShape = "Circle";

                    break;

                case 2:

                    Console.Write("Enter side: ");

                    int side = int.Parse(Console.ReadLine());

                    area = side * side;

                    pizzaShape = "Square";

                    break;

                case 3:

                    Console.Write("Enter base: ");

                    int b = int.Parse(Console.ReadLine());

                    Console.Write("Enter height: ");

                    int h = int.Parse(Console.ReadLine());

                    area = (b * h) / 2.0;

                    pizzaShape = "Triangle";

                    break;

                default:

                    Console.WriteLine("Invalid Shape: Try again\n");

                    break;

            }

​

        }

​

​

​

        while (toppings < 4 || toppings > 12)

        {

​

                Console.Write("Enter how many toppings :");

                toppings = int.Parse(Console.ReadLine());

                if (toppings < 4 || toppings > 12)

                {

​

                    Console.WriteLine("Toppings must be 4-12 only: Try again\n");

                }

                else

                {

                    price = 27.85 * area + 15.75 * toppings;

                }

        }

​

            Console.Write("What is your name? ");

            name = Console.ReadLine();

            while (gender != "male" && gender != "female")

            {

​

                Console.Write("What is your gender? (Male or Female) ");

                gender = Console.ReadLine().ToLower();

​

​

                if (gender.ToLower().Equals("male"))

                {

                    title = "Mr.";

                }

                else if (gender.ToLower().Equals("female"))

                {

                    title = "Ms.";

                }

                else

                {

​

                    Console.WriteLine("Gender Unknown: Try again");

                }

            }

​

            Console.WriteLine("\n\n======================================");

            Console.WriteLine("Name:  " + name);

            Console.WriteLine("Pizza: " + pizzaShape);

            Console.WriteLine("Price: " + price);

            Console.WriteLine("\nThank you. Please come back {0} {1}", title, name);

    }

}