import  java.util.*;

/*******************************************
* Author: Ryan Forster 19145178            *
* Purpose: To calculate the area of shapes *
* Date: 15/03/2018                         *
*******************************************/

public class ShapeCalculator
{
    public static void main( String [] args)
    {
         circleCalc();

         rectangleCalc();

         triangleCalc();
    }

    public static void circleCalc()
    {
         int circDiameter;

         double area;

         circDiameter = inputInteger("Enter diameter");

         area = calcCircArea(circDiameter);

         getDimensions(area);

    }

    public static void rectangleCalc()
    {
         double recLength, recWidth;

         recLength = inputReal("Enter length");

         recWidth = inputReal("Enter width");

         area = calcRecArea(recLength, recWidth);

         getDimensions(area);

    }

    public static void triangleCalc()
    {
         double triBase, triHeight;

         triBase = inputReal("Enter base");

         triHeight = inputReal("Enter height");

         area = calcTriArea(triBase, triHeight);

         getDimensions(area);

    }

    public static double calcCircArea(int circDiameter)
    {

         double radius, circSum, circArea;

         radius = (double)circDiameter / 2;

         circSum = radius * radius;

         circArea = circSum * Math.PI;

         return circArea;

    }

    public static double calcRecArea(double recLength, double recWidth)
    {
         double recArea;

         recArea = recLength * recWidth;

         return recArea;

    }

    public static double calcTriArea(double triBase, double triHeight)
    {
         double triArea;

         triArea = triBase * triHeight / 2;

         triArea = triArea / 100;

         return triArea;

    }

    public static void getDimensions(double area)
    {
         int getM, getCM;

         double getMM;

         getMM = (area - (int)area) * 100;

         getM = (int)area / 10000;

         getCM = (int)area - getM * 10000;

         System.out.println("The area of your shape is " + getM + "m^2 " + getCM + "cm^2 " + getMM + "mm^2");

    }

    public static int inputInteger(String msg);
    {
         int output;

         output = sc.nextInt();

         System.out.println(msg);

         return output;

    }

    public static double inputReal(String msg);
    {
         double output;

         output = sc.nextDouble();

         System.out.printlm(msg);

         return output;

    }

}