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// Name: msglm
// Date: 
// Program Name:
// Description: 


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

//Function header (probably should be in a header file)
double celsius_to_fahrenheit(double temp);
double fahrenheit_to_celsius(double temp);

// Named constants

int main() {

	//Variable declaration
	double temp;
	char format;
	int choice;
	//Program title and description for the user
	cout << "Title: Fahrenheit-to-Celsius Converter" << endl << "Description: converts Fahrenheit to Celsius temperature and vice-versa" << endl;
	do {
		//If your tempurature is improper, allow fixing
		if (!cin) {
			cin.clear();
			cin.ignore(100, '\n');
			cout << "\033[2J\033[1;1H";
			cout << "Your temp was improper, please retry\n";
		}

		// User input
		cout << "Enter the Temperature" << endl;
		cin >> temp;

		cout << "Enter the format (C or F)" << endl;
		cin >> format;

		//Presumptious error handling since numbers are valid characters
		if (format != 'c' || format != 'C' || format != 'f' || format != 'F') {
			cout << "Format is improper. Assuming Celcius.\n";
			format = 'C';
		}

	} while (!cin);

	//Display input methods for first time
	cout << "1. Convert Celsius to Fahrenheit\n";
	cout << "2. Convert Fahrenheit to Celsius\n";
	cout << "3. Display Choices\n";

	do {
		//Get user choice
		cout << "Choice: ";
		cin >> choice;

			
			if (choice == 1) {
				//Ensure this is actually C, if not, do nothing
				if (format == 'C' || format == 'c') {
					temp = celsius_to_fahrenheit(temp);
					format = 'F';
				}

			} else if (choice == 2) {
				//Ensure this is actually F, if not, do nothing
				if (format == 'F' || format == 'f') {
					temp = fahrenheit_to_celsius(temp);
					format = 'C';
				}
			
			} else {
				//Choices in case the user forgets
				cout << "1. Convert Celsius to Fahrenheit\n";
				cout << "2. Convert Fahrenheit to Celsius\n";
				cout << "3. Display Choices\n";
			}
			
			//Output to screen
			cout << "\nIt is currently " << temp << " degrees " << format << endl;
			
			//Cold or Hot detection
			if (( (format == 'F' || format == 'f') && temp <=32) || ( (format == 'C' || format == 'c') && temp <=0) ) {
				cout << "Temperature is below freezing.\n";
			} else if (( (format == 'F' || format == 'f') && temp >= 104) || ( (format == 'C' || format == 'c') && temp >=40) ) {
				cout << "Temperature is incredibly hot.\n";
			}
	} while (cin);
}

//Functions
double celsius_to_fahrenheit(double temp) {
	return temp*(1.8)+32;
}

double fahrenheit_to_celsius(double temp) {
	return (temp-32)/(1.8);
}

/*This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 */