import java.util.Scanner;
public class TipCalc {

	public static void main(String[] args) {

		//Prerequisites

		//Variables
		double cost = 0;
		double tipPre = 0;
		double tip = 0;
		double total;
		double splitPre = 0;
		double split = 0;
		boolean rerun = false;
		boolean actualNum = false;
		String goAgain = "yes";
		String addtext = "";

		//scanner
		Scanner kb = new Scanner(System.in);

		//Program Start
		while(goAgain.equals("yes")) {
			//is this an additional tip calculation?
			if(rerun == true) {
				addtext = "again";
			}
			else {
			}

			System.out.println("Hello " + addtext + "! (^ｰ^)ノ \nPlease enter the price of the meal as a decimal(no $)");

			//id10t proofing
			while(actualNum == false) {
				if(kb.hasNextDouble() == true) {
					cost = kb.nextDouble();
					if(cost <= 0) {
						System.out.println("The food must be pretty bad if they are giving it to you for free or if they are paying you to eat it. Please enter a number above 0");
					}
					else {
						actualNum = true;
					}
				}
				else {
					System.out.println("Please enter an actual number.");
					kb.nextLine();
				}
			}

			actualNum = false;

			System.out.println("Now please eneter the tip precent (no %)");

			//id10t proofing
			while(actualNum == false) {
				if(kb.hasNextDouble() == true) {
					tipPre = kb.nextDouble();
					if(tipPre < 0) {
						System.out.println("The service must be pretty bad if you expect them to pay you. Please enter a number that is not negitive");
					}
					else if(tipPre == 0) {
						System.out.println("Wow, no tip.");
						actualNum = true;
					}
					else {
						actualNum = true;
					}
				}
				else {
					System.out.println("Please enter an actual number.");
					kb.nextLine();
				}
			}

			actualNum = false;

			//math to calculate tip
			tipPre = tipPre / 100;

			tip = cost * tipPre;

			//rounding
			tip = (tip * 100) + 0.5;
			tip = (int) tip;
			tip = (double) tip / 100;

			cost = (cost * 100) + 0.5;
			cost = (int) cost;
			cost = (double) cost / 100;

			//math for total cost
			total = cost + tip;

			//converting this back into a whole number to be displayed later
			tipPre = tipPre * 100;

			System.out.println("For a meal that costs " + cost + " and a tip of " + tipPre + "%, your tip is " + tip + " and your total cost is " + total + ".");

			System.out.println("Please type how many people you are splitting the bill with. If you are alone, just type 1");

			//id10t proofing
			while(actualNum == false) {
				if(kb.hasNextInt() == true) {
					split = kb.nextInt();
					if(split <= 0) {
						System.out.println("You must be really lonely to have no one eating. Please enter a number above 0");
					}
					else {
						actualNum = true;
					}
				}
				else {
					System.out.println("Please enter an actual number.");
					kb.nextLine();
				}
			}

			actualNum = false;

			//math for calculating the percentage of price per person split
			splitPre = total / split;

			//more rounding
			splitPre = (splitPre * 100) + 0.5;
			splitPre = (int) splitPre;
			splitPre = (double) splitPre / 100;

			System.out.println("If you are splitting the bill between " + split + " people evenly, each person pays " + splitPre + ".");

			System.out.println("Would you like to calculate another tip?" // restart?
					+ "\nif so, type \"yes\", if not type \"no\".");

			//id10t proofing
			while(actualNum == false) {
				goAgain = kb.next();
				if(goAgain.equals("yes") == false && goAgain.equals("no") == false) {
					System.out.println("Please type \"yes\" or \"no\"");
				}
				else {
					actualNum = true;
				}
			}
			rerun = true;
		}





	}

}