// BlankConsoleLab.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <cmath>

using namespace std;

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

int selectType();
float getTemp(int& select);
float calcTemp(float& temp);
float getWindSpeed();
void calcWindChill(float temp, float windSpeed);

// function main, no inputs, returns 0
int main()
{
    float temp;
    int select = 0;
    float windSpeed = 0;

    select = selectType();
    temp = getTemp(select);
    if (select == 2)
        temp = calcTemp(temp);
    windSpeed = getWindSpeed();

    calcWindChill(temp, windSpeed);

    return 0;
}
// function selectType, no inputs, returns select
int selectType()
{
    char choose = '0';
    int select = 0;

    while (select != 1 && select != 2)
    {
        cout << "Enter temperature in Fahrenheit or Celsius?" << endl << "[1] Fahrenheit" << endl << "[2] Celsius" << endl;
        cout << "Selection: ";
        cin >> choose;

        if (choose == '1')
            select = 1;
        else if (choose == '2')
            select = 2;
        else cout << "Please enter only 1 or 2." << endl;
    }

    return select;
}
// function getTemp, inputs select, returns temp
float getTemp(int& select)
{
    float temp =-100;
    const int minC = -62;
    const int maxC = 49.5;
    const int minF = -80;
    const int maxF = 121;

    if (select == 1)
    {
        while (temp < minF || temp > maxF)
        {
            cout << endl << "Enter temperature: ";
            cin >> temp;

            if (temp < minF || temp > maxF)
                cout << endl << "Please enter between " << minF << " and " << maxF << "." << endl;
        }
    }

    if (select == 2)
    {
        while (temp < minC || temp > maxC)
        {
            cout << endl << "Enter temperature: ";
            cin >> temp;

            if (temp < minC || temp > maxC)
                cout << endl << "Please enter between " << minC << " and " << maxC << "." << endl;
        }
    }

    return temp;
}
// function calcTemp, nputs temp, returns temp
float calcTemp(float& Celsius)
{
    float Fahrenheit = 0;

    Fahrenheit = 32 + ((9 * Celsius) / 5);

    return Fahrenheit;
}
// function getWindSpeed, no inputs, returns windSpeed
float getWindSpeed()
{
    float windSpeed = -100;

    {
        while (windSpeed < 0 || windSpeed > 231)
        {
            cout << endl << "Enter wind speed in MPH: ";
            cin >> windSpeed;

            if (windSpeed < 0 || windSpeed > 231)
                cout << endl << "Please enter between " << 0 << " and " << 231 << "." << endl;
        }
    }

    return windSpeed;
}
// function getWindChill, inputs temp and windSpeed, no return
void calcWindChill(float temp, float windSpeed)
{
    float windChill = 0;

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

    cout << endl << windChill;
}