// CST116-lab2-joetraver30.cpp

#include <iostream>
#include <math.h>
#include <stdio.h>

using std::cout;
using std::cin;
using std::endl;

void GetInfo(char& letter, float& t, float& T, int& W);
float FahrenheitConversion(float T);
float WindChillCalculation(int W, float t);


int main()
{
	char letter = {};
	float T = 0;
	int W = 0;
	float t = 0;
	float C = 0;


	GetInfo(letter, t, T, W);

	if (letter == 'c' || letter == 'C')
		t = FahrenheitConversion(T);

	cout << "Temperature is: " << t << " Degrees Fahrenheit" << endl << endl;

	cout << "Wind speed is: " << W << " MPH" << endl << endl;

	C = WindChillCalculation(W, t);

	cout << "For " << t << " degrees F and " << W << " MPH, the windchill is: " << C << endl;


}

//compiles information from the user
void GetInfo(char& letter, float& t, float& T, int& W)
{

	//ask for type of temp unids that need to be used
	cout << "Enter temperature units Celcius or Fahrenheit (C/F): ";
	cin >> letter;

	cout << endl;

	//error check
	while (!((letter == 'c') || (letter == 'C') || (letter == 'f') || (letter == 'F')))
	{

		cout << "ERROR: a F or C must be entered";

		cin.clear();

		cin.ignore();

		cout << endl << endl;

		cout << "Enter temperature units Celcius or Fahrenheit (C/F): ";

		cin >> letter;

		cout << endl;


	}

	if (letter == 'c' || letter == 'C')

	{

		//ask for temp in C
		cout << "Enter the temperature in Celcuius between -62 degrees & 49.5 degrees: ";
		cin >> T;

		cout << endl;

		//Bounds check
		while (!((T >= -62) && (T <= 49.5F)))

		{
			cout << "Temperature lies outside of accepted bounds" << endl;

			cin.clear();

			cin.ignore();

			cout << endl;

			cout << "Enter the temperature in Celcuius between -62 degrees & 49.5 degrees: ";

			cin >> T;

			cout << endl;


		}
	}

	else
	{
		//ask for temp in F
		cout << "Enter the temperature in Fahrtenheit beteen -80 degrees & 121 degrees: ";
		cin >> t;

		cout << endl;

		//Bounds check
		while (!((t >= -80) && (t <= 121)))
		{

			cout << "Temperature lies outside of accepted bounds" << endl;

			cin.clear();

			cin.ignore();

			cout << endl;

			cout << "Enter the temperature in Fahrtenheit beteen -80 degrees & 121 degrees: ";

			cin >> t;

			cout << endl;
		}
	}
	// requests wind speed
	cout << "Enter wind speed between 0 MPH & 231 MPH: ";
	cin >> W;

	cout << endl;

	//Bounds check
	while (!((W >= 0) && (W <= 231)))
	{

		cout << "Wind speed lies outside of accepted bounds" << endl;

		cin.clear();

		cin.ignore();

		cout << endl;

		cout << "Enter wind speed between 0 MPH & 231 MPH: ";

		cin >> W;

		cout << endl;
	}
}
//Fahrenheit Conversion Function that returns a floating value
float FahrenheitConversion(float T)
{

	return (((9.0F / 5) * T) + 32);

}
//wind chill calculation that returns a floating value
float WindChillCalculation(int W, float t)
{

	return (35.74F + 0.6215F * t - 35.75 * (pow(W, 0.16F)) + 0.4275F * t * (pow(W, 0.16F)));

}