// Your Name : msglm
// Date: Feb-17-2022
// Program Title: MENU TEMPLATE with IF ELSE
// Program Description: a program with a menu structure that will allow the user to choose an option to calculate area for a: Rectangle, Circle, and a Triangle 

#include <iostream>
#include <string>
#include <iomanip>
#include <cmath>

using namespace std;

// Named constants

int main()
{

	// Variable declaration

	int choice;
	double area;
	char option;
	//Program title and description for the user

	cout << "MENU TEMPLATE with IF ELSE" << endl << endl;

	// User input
	do {
	do {
		cout << "Choose the corresponding number for what task you want to complete." << endl;
		cout << "1 - Perform task #1 : Rectangle area" << endl;
		cout << "2 - Perform task #2 : Circle area" << endl;
		cout << "3 - Perform task #3 : Triangle area" << endl;
		cout << "Enter selected number here: ";
		cin >> choice;




		if (!cin || choice<1 || choice>4) {
			cout << "Invalid input selection\n\n";
			//This will purge the garbage data
			cin.clear(); //Clears error flag
			cin.ignore(100, '\n');  //Purges 100 characters of input
		}

	} while (!cin || choice<1 || choice>4);
	// Calculations

	// Output to the screen

	//This if-else statement need not exist: a switch statement would be much more optimal
	if (choice == 1)
	{
		double height;
		double width;

		//User Input
		cout << "Perform task #1 : Rectangle area" << endl;
		cout << "Input the height in cm: \n";
		cin >> height;

		cout << "Input the width in cm: \n";
		cin >> width;

		//Calculation
		area = height * width;

		//Output
		cout << "Area of the rectangle is " << area << " cm^2 \n";
	}
	else if (choice == 2)
	{
		cout << "Perform task #2 : Circle area" << endl;
		double inputRadius;
		string measurement;
		const double pi = 3.14159; 

		//User Input
		cout << "Please Input the Desired Radius for your Circle in cm: ";
		cin >> inputRadius; 

		//Output
		cout << "Area of the circle is " << pi*pow(inputRadius, 2) << "cm^2 \n";

	}
	else if (choice == 3)
	{
		double height;
		double base;

		//User Input
		cout << "Perform task #3 : Triangle area" << endl;
		cout << "Input the height in cm: \n";
		cin >> height;

		cout << "Input the base in cm: \n";
		cin >> base;

		//Output
		cout << "Area of the rectangle is " << (height*base)/2 << " cm^2 \n";
	}
	else
		cout << "Terminating" << endl;
	cout << "Would you like to run again? (Y/N): ";
	cin >> option;
	cout << "\033c";
	} while (option == 'Y' || option == 'y');

	return 0;
}
/*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/>.
 */