//QUIOGUE, EMRIC R.

//TANGHAL, KEAN SEBASTIAN O.

//CCP 1103 - ITAC

//AREA OF VARIOUS GEOMETRICAL SHAPE.

​

using System;

​

namespace AreaGeometricalShapes

{

    public class Program

    {

        public static void Main(string[] args)

        {

            string input;

            string inputShape;

            int option;

            double radius;

            double length;

            double width;

            double baseT;

            double height;

​

            Console.WriteLine("Are of various geometrical shape.");

            Console.WriteLine("------------------------------------");

            Console.WriteLine("Select an option \n[1] Area of Circle \n[2] Area of Rectangle \n[3] Area of Triangle");

            Console.Write("Enter option: ");

            input = Console.ReadLine();

​

            if (Int32.TryParse(input, out option) == true)

            {

                if (option < 1 || option > 3)

                {

                    Console.Write("Option must be from 1 to 3 only. Please input a valid opion.");

                }

                else

                {

                    switch (option)

                    {

                        case 1:

                            Console.Write("Enter radius of circle: ");

                            inputShape = Console.ReadLine();

​

                            if (Double.TryParse(inputShape, out radius) == true)

                            {

                                double area = 3.1416 * (radius * radius);

                                Console.Write("The area of the circle is {0:#,0.0000}.", area);

                            }

                            else

                            {

                                Console.Write("Invalid input.");

                            }

                            break;

                        case 2:

                            Console.Write("Enter length of rectangle: ");

                            inputShape = Console.ReadLine();

​

                            if (Double.TryParse(inputShape, out length) == true)

                            {

                                Console.Write("Enter width of rectangle: ");

                                inputShape = Console.ReadLine();

​

                                if (Double.TryParse(inputShape, out width) == true)

                                {

                                    double area = length * width;

                                    Console.Write("The area of the rectangle is {0:#,0.0000}.", area);

                                }

                                else

                                {

                                    Console.Write("Invalid input.");

                                }

                            }

                            else

                            {

                                Console.Write("Invalid input.");

                            }

                            break;

                        case 3:

                            Console.Write("Enter base of triangle: ");

                            inputShape = Console.ReadLine();

​

                            if (Double.TryParse(inputShape, out baseT) == true)

                            {

                                Console.Write("Enter height of triangle: ");

                                inputShape = Console.ReadLine();

​

                                if (Double.TryParse(inputShape, out height) == true)

                                {

                                    double area = (baseT * height) / 2;

                                    Console.Write("The area of the triangle is {0:#,0.0000}.", area);

                                }

                                else

                                {

                                    Console.Write("Invalid input.");

                                }

                            }

                            else

                            {

                                Console.Write("Invalid input.");

                            }

                            break;

                        default:

                            Console.Write("Invalid input.");

                            break;

                    }

                }

            }

            else

            {

                Console.Write("Invalid input.");

            }

        }

    }

}

​