// CST 116, Lab2: Baby it's cold outside, Lloyd Crawford. This file contains the 'main' function. Program execution begins and ends there.
//


#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;



//Part 2

float c_2_f(float c)
{
	return (9.0 / 5.0) * (c + 32);
}

void f_2_c(float f, float& c)
{
	c = (5.0 / 9.0) * (f - 32);
}

float GetWindChill(float temp, float windSpeed)
{

	// Calculates the wind chill in fahrenheit, and can convert it to celsius using a previous function

	float windChill;

	windChill = 35.74 + (0.6215 * temp) + (pow(windSpeed, 0.16) * ((0.4275 * temp) - 35.75));

	return windChill; // Returns the wind chill based on what the user entered before the function has been called. Only outputs as fahrenheit.

}

int main()
{
	//Part 1
	char convert_choice = '0';
	float celcius = -200; // force to be out of range  -62 to 49.5
	float fahrenheit = -200; // force to be out of range -80 & 121
	float windChill = 0;
	float windSpeed = -1; // force to be out of range 0 and 231


	while (convert_choice != 'C' && convert_choice != 'F') // force to be C or F
	{
		cout << "Enter C for Celsius to Fahrenheit or F for Fahrenheit to Celsius: ";
		cin >> convert_choice;
	}
	if (convert_choice == 'C')
	{
		while (celcius < -62 || celcius > 49.5)  // force range here -62 to 49.5
		{
			cout << "Enter a number for degree in Celsius from -62 to 49.5: ";
			cin >> celcius;
		}
		fahrenheit = c_2_f(celcius);
	}
	else
	{
		while (fahrenheit < -80 || fahrenheit > 121) // forces fahrenheit to be between -80 & 121
		{
			cout << "Enter a number for degree in fahrenheit from -80 to 121: ";
			cin >> fahrenheit;
		}
		f_2_c(fahrenheit, celcius);  // call conversion function with pbv and pbr parameters
	}

	while (windSpeed < 0 || windSpeed > 231) {

		cout << "Please enter a number for the wind speed from 0 to 231 mph.\n";
		cin >> windSpeed;

	}


	windChill = GetWindChill(fahrenheit, windSpeed);

	cout << fixed << setprecision(2) << left;
	cout << setw(20) << "CELSIUS" << setw(20) << "FAHRENHEIT" << setw(20) << "WIND SPEED" << setw(20) << "WIND CHILL" << endl;
	cout << setw(20) << celcius << setw(20) << fahrenheit << setw(20) << windSpeed << setw(20) << windChill << endl;
	cout << "Here is your data. Bundle up!" << endl;
	return 0;
}