using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace GeometricCalculations
{
	class Triangle
	{
		public double area;
		public double baseWidth;
		public double height;

		public void CalculateTriangleArea(string measurementType)
		{

			Console.WriteLine("What is the height of the triangle you are attempting to measure?");
			height = Convert.ToDouble(Console.ReadLine());
			Console.WriteLine("What is the base of the triangle you are attempting to measure?");
			baseWidth = Convert.ToDouble(Console.ReadLine());

			area = 0.5 * (baseWidth * height);

			Console.WriteLine("The area of the triangle is " + area + " " + measurementType);
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}

	class Square
	{
		public double area;
		public double side;

		public void CalculateSquareArea(string measurementType)
		{

			Console.WriteLine("What is the length of the square you are attempting to measure?");
			side = Convert.ToDouble(Console.ReadLine());

			area = (Math.Sqrt(side));

			Console.WriteLine("The area of the circle is " + area + " " + measurementType);
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}

	class Rectangle
	{
		public double area;
		public double width;
		public double height;

		public void CalculateRectangleArea(string measurementType)
		{

			Console.WriteLine("What is the width of the rectangle you are attempting to measure?");
			height = Convert.ToDouble(Console.ReadLine());
			Console.WriteLine("What is the height of the triangle you are attempting to measure?");
			baseWidth = Convert.ToDouble(Console.ReadLine());

			area = width * height;

			Console.WriteLine("The area of the triangle is " + area + " " + measurementType);
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}

	class Parallelogram
	{
		public double area;
		public double baseWidth;
		public double verticalHeight;

		public void CalculatePareallelogramArea(string measurementType)
		{

			Console.WriteLine("What is the base of the parallelogram you wish to measure?");
			baseWidth = Convert.ToDouble(Console.ReadLine());
			Console.WriteLine("What is the height of the parallelogram you are attempting to measure?");
			baseWidth = Convert.ToDouble(Console.ReadLine());

			area = baseWidth * verticalHeight;

			Console.WriteLine("The area of the parallelogram is " + area + " " + measurementType);
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}	

	class Trapezod
	{
		public double area;
		public double topWidth;
		public double bottomWidth;
		public double verticalHorizon;

		public void CalculateTrapezoidArea(string measurementType)
		{

			Console.WriteLine("What is the width of the top of the trapezoid you are attempting to measure?");
			topWidth = Convert.ToDouble(Console.ReadLine());

			Console.WriteLine("What is the width of the bottom of the trapezoid you are attempting to measure?");
			bottomWidth = Convert.ToDouble(Console.ReadLine());

			Console.WriteLine("What is the vertical horizon of the trapezoid you are attempting to measure?");
			verticalHorizon = Convert.ToDouble(Console.ReadLine());

			area = 0.5 * (topWidth + bottomWidth) * verticalHorizon;
		
			Console.WriteLine("The area of the trapezoid is " + area + " " + measurementType);
	
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}

	class Circle
	{
		public double area;
		public double radius;
		public double pi = 3.14159;

		public void CalculateCircleArea(string measurementType)
		{

			Console.WriteLine("What is the radius of the circle you wish to measure?");
			radius = Convert.ToDouble(Console.ReadLine());

			area = pi * (Math.sqrt(radius));

			Console.WriteLine("The area of the circle is " + area + " " + measurementType + "squared");
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}
		
	class Ellipse
	{
		public double area;
		public double height;
		public double width;
		public double pi = 3.14159;

		public void CalculateEllipseArea(string measurementType)
		{

			Console.WriteLine("What is the height of the ellipse you are attempting to measure?");
			radius = Convert.ToDouble(Console.ReadLine());

			Console.WriteLine("What is the width of the ellipse you are attempting to measure?");
			width = pi * width * height;

			Console.WriteLine("The area of the ellipse is " + area + " " + measurementType + "squared");
			
			Console.Write("Press Enter To TerminateÉ");
			Console.Read();

		}
	}

	class Program
	{
		static void Main(string[] args)
		{
			int selectionValue;
			string typeOfMeasurement;

			Console.WrtieLine("The program will allow you to calculate the area of several plane shapes.\n\nPress 1 to calculate the area of a triangle\nPress 2 to calculate the area of a square\nPress 3 to calculate the area of a triangle\nPress 4 to calculate the area of a pareallelogram\nPress 5 to calculate the area of a circle\nPress 7 to calculate the area of an ellipse.\n\nEnter your selection:");
			selectionValue = Convert.ToInt32(Console.ReadLine());
			Console.WriteLine("Would you like to calculate the measurement in inches or feet?");
			typeOfMeasurement = Convert.ToString(Console.ReadLine());

			if (selectionValue == 1)
			{
				Triangle triangle = new Triangle();
				triangle.CalculateTriangleArea(typeOfMeasurement);
			}
			else if (selectionValue == 2)
			{
				Square square = new Square();
				square.CalculateSquareArea(typeOfMeasurement);
			}
			else if (selectionValue == 3)
			{
				Square square = new Rectangle();
				rectangle.CalculateRectangleArea(typeOfMeasurement);
			}
			else if (selectionValue == 4)
			{
				Parallelogram parallelogram = new Paralleologram();
				paralleogram.CalculateParalleogramArea(typeOfMeasurement);
			}
			else if (selectionValue == 5)
			{
				Trapezoid trapezoid = new Trapezoid();
				trapezoid.CalculateTrapezoidArea(typeOfMeasurement);
			}
			else if (selectionValue == 6)
			{
				Circle circle = new Circle();
				circle.CalculateCircleArea(typeOfMeasurement);
			}
			else if (selectionValue == 7)
			{
				Ellipse ellipse = new Ellipse();
				ellipse.CalculateEllipseArea(typeOfMeasurment);
			}
			else
			{
				Console.WriteLine("You did not enter a valid selection value.");
				Console.WriteLine("Press any key to terminateÉ");
				Console.Read();
			}

		}
	 } 
}