//ARCILLA, JOHN PAULO S.

//UYQUIENGCO, ALDRIN A.

//CCP-1103 -ITAC

//AREA OF VARIOUS GEOMETRICAL SHAPE

​

using System;

​

​

public class Program

{

    public static void Main(string[] args)

    {

        string input;

        string inputRadius;

        string inputLength;

        string inputWidth;

        string inputBase;

        string inputHeight;

        int option;

        int radius;

        int length;

        int width;

        int tBase;

        int height;

        double cArea;

        double rArea;

        double tArea;

​

​

        Console.WriteLine("AREAS OF VARIOUS GEOMETRICAL SHAPE.");

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

        Console.WriteLine("SELECT AN OPTION:");

        Console.WriteLine("[1] AREA OF CIRLCE \n[2] AREA OF RECTANGLE \n[3] AREA OF TRIANGLE");

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

        input = Console.ReadLine();

​

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

        {

            if (option <= 0)

            {

                Console.Write("NEGATIVE NUMBER IS NOT ALLOWED!, PLEASE TRY AGAIN!");

            }

            else if (option > 3) 

            {

                Console.Write("INVALID INPUT, PLEASE SELECT FROM OPTION 1-3");

            }

            else

            {

​

                if (option == 1)

                {

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

                    inputRadius = Console.ReadLine();

​

                    if (Int32.TryParse(inputRadius, out radius ) == true)

                    {

                        if (radius <= 0)

                        {

                            Console.Write("Negative number  is not allowed!");

                        }

                        else 

                        {

                            cArea = (3.1416 * (radius * radius));

                            Console.Write("The Area of Cirlce is {0:#,0.0000}.", cArea);

                        }

                    }

                    else 

                    {

                        Console.Write("LETTER IS NOT ALLOWED!");

                    }   

                }

                else if (option == 2 )

                {

                    Console.Write("Enter the Length of the Rectangle: ");

                    inputLength = Console.ReadLine();

​

                    if (Int32.TryParse(inputLength, out length) == true)

                    {

                        if (length <= 0)

                        {

                            Console.Write("Negative number  is not allowed!");

                        }

​

                        else

                        {

                            Console.Write("Enter the width of the Rectangle: ");

                            inputWidth = Console.ReadLine();

                            if (Int32.TryParse(inputWidth, out width) == true)

                            {

                                if (width <= 0)

                                {

                                    Console.Write("Negative number  is not allowed!");

                                }

                                else

                                {

                                    rArea = length * width;

                                    Console.Write("The Area of Reactangle is {0:#,0.0000}.", rArea);

                                }

                            }

                            else

                            {

                                Console.Write("LETTER IS NOT ALLOWED!");

                            }

                        }

                    }

                    else 

                    {

                        Console.Write("LETTER IS NOT ALLOWED!");

                    }

​

                }

                else if (option ==3 )

                    {

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

                    inputBase = Console.ReadLine();

​

                    if (Int32.TryParse(inputBase, out tBase) == true)

                    {

                        if (tBase <= 0)

                        {

                            Console.Write("Negative number  is not allowed!");

                        }

                        else

                        {

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

                            inputHeight = Console.ReadLine();

                            if (Int32.TryParse(inputHeight, out height) == true) 

                            {

                                if (height <= 0)

                                {

                                    Console.Write("Negative number is not allowed!");

                                }

                                else

                                {

                                    tArea = tBase * height / 2;

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

                                }

​

                            }

                            else 

                            {

                                Console.Write("LETTER IS NOT ALLOWED!");

                            }

                        }

                    }

                    else

                    {

                        Console.Write("LETTER IS NOT ALLOWED!");

                    }

                }

            }

        }

        else 

        {

            Console.WriteLine("LETTER IS NOT ALLOWED, PLEASE CHOOSE FORM OPTION 1-3");

        }

    }

}