//TING, DANIEL JOSHUA JACOB

//AQUINO, JOSHUA

//CCP_1103

//AreaOfVariousGeometricalShape

​

using System;

public class Area

{    

  public static void Main(string[] args)

    {

    double radius;

    double circle;

    int option;

    double lenght; 

    double width;

    double rectangle;

    double Base;

    double height;

    double triangle;

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

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

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

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

    option =Convert.ToInt32(Console.ReadLine());

        // Area of cirle

        if (option == 1) 

        {

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

            radius = Convert.ToInt32(Console.ReadLine());

            if (radius > 0)

            {

                circle = (3.14) * radius * radius; 

                Console.WriteLine("The Area of circle of given radius is = " + circle);

            } else { 

            Console.WriteLine("Zero or negative cannot be accepted.  ");

            }

        // Area of rectangle    

        } else if (option == 2) {   

            Console.Write("Enter length : ");

            lenght=Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter width : ");

            width=Convert.ToInt32(Console.ReadLine());

            if ((lenght > 0) && ( width > 0))

            {

            rectangle = lenght * width; 

            Console.WriteLine("The area of rectangle is = " + rectangle); 

            } else { 

            Console.WriteLine("Zero or negative cannot be accepted. ");

            }

        // Area of Triangle 

        } else if (option == 3) {

            Console.Write("Enter Base : "); 

            Base = Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter Height : ");

            height = Convert.ToInt32(Console.ReadLine());

            if ((Base > 0) && ( height > 0))

            {

            triangle = Base * height / 2; 

            Console.WriteLine("The area of triangle is = " + triangle);

            } else { 

            Console.WriteLine("Zero or negative cannot be accepted. ");

            }

        }                 

    }

}