//CAPITULO, JORBEN LANCE G.

//CONCEPCION, JEROME

//CCP 1103 - ITBC

//AREA OF VARIOUS GEOMETRICAL SHAPE

using System;

​

public class AreaOfVariousGeometricalShapes

{

    public static void Main(string[] args)

    {

        string inputOption;

        string inputRadius;

        string inputLength;

        string inputWidth;

        string inputHeight;

        string inputBase;

        double length;

        double radius;

        double width;

        double height;

        double newBase;

        double areaOfRectangle;

        double areaOfTriangle;

        double areaOfCircle;

        int option;

​

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

        Console.WriteLine("Select option");

        Console.WriteLine("[1] Area of Circle");

        Console.WriteLine("[2] Area of Rectangle");

        Console.WriteLine("[3] Area of Triangle");

        Console.Write("Enter your option: ");

        inputOption = Console.ReadLine();

​

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

        {

            if (option <= 0)

            {

                Console.WriteLine("Zero or negative input option is not allowed.");

            }

            else if (option == 1)

            { 

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

                inputRadius = Console.ReadLine();

​

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

                {

                    if (radius <= 0)

                    {

                        Console.WriteLine("Zero or negative input radius is not allowed.");

                    }

                    else

                    {

                        areaOfCircle = 3.14 * radius * radius;

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

                    }

                }

                else

                {

                    Console.WriteLine("Invalid input radius.");

                }

            }

            else if (option == 2)

            {

                Console.Write("Enter a length: ");

                inputLength = Console.ReadLine();

​

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

                {

                    if (length <= 0)

                    {

                        Console.WriteLine("Zero or negative input length is not allowed.");

                    }

                    else

                    {

                        Console.Write("Enter a width: ");

                        inputWidth = Console.ReadLine();

​

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

                        {

                            if (width <= 0)

                            {

                                Console.WriteLine("Zero or negative input width is not allowed.");

                            }

                            else

                            {

                                areaOfRectangle = length * width;

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

                            }

                        }

                        else

                        {

                            Console.WriteLine("Invalid input width.");

                        }

                    }

                }

                else

                {

                    Console.WriteLine("Invalid input length.");

                }

            }

            else if (option == 3)

            {

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

                inputBase = Console.ReadLine();

​

                if(Double.TryParse(inputBase, out newBase) == true)

                {

                    if (newBase <= 0)

                    {

                        Console.WriteLine("Zero or negative input base is not allowed.");

                    }

                    else

                    {

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

                        inputHeight = Console.ReadLine();

​

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

                        {

                            if (height <= 0)

                            {

                                Console.WriteLine("Zero or negative input height is not allowed");

                            }

                            else

                            {

                                areaOfTriangle = .5 * newBase * height;

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

​

                            }

                        }

                        else

                        {

                            Console.WriteLine("Invalid input height.");

                        }

                    }

                }

                else

                {

                    Console.WriteLine("Invalid input base.");

                }

            }

            else

            {

                Console.WriteLine("Invalid option.");

            }

        }

    }

}