//This program adds two user unput numbers
//Bother the numbers and the results are stored as floats. Then the result is displayed.

using Microsoft.VisualBasic;
using System;

namespace ENGR115_JanTerm_Module3
{
    class Program
    {
        static void Main(string[] args)
        {
            // define constants
            float R = 287.0f;  //Joules/(Kg K) 
            float gravity = 9.81f; //[m/^2] 
            float fluidDensity = 13545.0f; //[kg/m^3] density of mercury 

            //define variables 
            //float Altitude;  //[m] 
            float airTemperaturec; //[degrees C] 
            float airTemperaturek; //[degrees C]
            float airDensity;  //[ kg/m^3] 
            float airPressure; //I added these floats
            float pressureatSealevel; //I added these floats
            float fluidHeight; //I added these floats
            float deltaP; // Difference in pressure
            float airtempseaLevel;

            int Altitude;
            int Interval;
            int Althigh;



            string inputealtitudelow;
            string inputealtitudehigh;
            string inputinterval;




            Console.WriteLine("Please enter Lower altitude. (min value 0)");
            inputealtitudelow = Console.ReadLine();
            while (!int.TryParse(inputealtitudelow, out Altitude))
            {
                Console.WriteLine("Please enter a whole number");
                inputealtitudelow = Console.ReadLine();
            }

            Console.WriteLine("Please enter Higher altitude. (max value 11000)");
            inputealtitudehigh = Console.ReadLine();
            while (!int.TryParse(inputealtitudehigh, out Althigh))
            {
                Console.WriteLine("Please enter a whole number");
                inputealtitudehigh = Console.ReadLine();
            }

            Console.WriteLine("Please enter repete interval. (multiple of 100)");
            inputinterval = Console.ReadLine();
            while (!int.TryParse(inputinterval, out Interval))
            {
                Console.WriteLine("Please enter a whole number");
                inputinterval = Console.ReadLine();
            }

            Console.WriteLine("Altitude     Temperature     Air Density     Pressure     Delta P     h");
            Console.WriteLine("  (m)            (C)          (kg/m^3)        (kPa)        (Pa)      (m)");

            for (int i = Altitude; i <= Althigh; i+=Interval)
            {
                //perform calculations for a given altitude 
                airtempseaLevel = 15;
            airTemperaturec = (airtempseaLevel + ((-0.0065f) * (i + Interval)));
            airTemperaturek = airTemperaturec + 273;
            airDensity = 1.225f * MathF.Exp((float)(-0.000104368 * (i + Interval)));
            airPressure = (airDensity * R * (airTemperaturek + 287f));
            pressureatSealevel = 1.225f;
            fluidHeight = (pressureatSealevel - airPressure) / (fluidDensity * gravity);
            deltaP = pressureatSealevel - airPressure;

            /*Console.WriteLine("Altitude (m) {0}", Altitude);
            Console.WriteLine("Temperature (C) {0}", airTemperaturec);
            Console.WriteLine("Air Density (kg/m^3) {0}", airDensity);
            Console.WriteLine("Pressure (kPa) {0}", airPressure);
            Console.WriteLine("Delta P (Pa) {0}", deltaP);
            Console.WriteLine("h (m) {0}", fluidHeight);//fluid hight*/
            
            Console.WriteLine("{0}            {1}          {2}     {3}   {4}  {5}", i + Interval, airTemperaturec, airDensity, airPressure, deltaP, fluidHeight);
            }
            //Console.WriteLine(continueMessage)
            Console.ReadLine();
        }
    }
}