Vending Machine

VendingMachine.java

+// Program:	VendingMachine.java
+// Purpose: This program simulates a vending machine.
+// Author:	Brian Vojtko	
+// Date:	10/16/2018
+
+import java.util.Scanner;
+
+public class VendingMachine {
+
+	public static void main(String[] args) 
+	{	
+		Scanner input = new Scanner(System.in);
+		
+		//Integers
+		int choice = 0;
+		double remain = 0.00;
+		double money = 0.00;
+		double change = 0.00;
+		double item1 = 1.25;
+		double item2 = 1.75;
+		double item3 = 0.90;
+		double item4 = 0.75;
+		double item5 = 1.50;
+		double item6 = 2.00;
+		
+		//User Prompt
+		System.out.println("    CS 570 Vending Machine");
+		System.out.println("---------------------------------");
+		System.out.println("1. Roasted Almonds --> $1.25");
+		System.out.println("2. Pretzels --> $1.75");
+		System.out.println("3. Chewing Gum --> $0.90");
+		System.out.println("4. Mints --> $0.75");
+		System.out.println("5. Chocolate Bar --> $1.50");
+		System.out.println("6. Cookies --> $2.00");
+		
+		//User Input Vending Choice
+		System.out.println("Enter your choice of item: ");
+		choice = input.nextInt();
+		
+		//Error
+		if (choice > 6 || choice < 1) {
+			System.out.println("Error: Invalid Choice. Please try again.");
+			return;
+		}
+		
+		//User Input Money
+		else 
+		System.out.println("Enter money to purchase item: ");
+		money = input.nextDouble();
+		
+		switch(choice)
+		
+		{
+		//Choice 1
+		case 1:
+			
+			if(money < item1) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item1 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item1;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying roasted almonds. Your change is $" + change + ".");
+			
+			break;
+		
+		//Choice 2
+		case 2:
+			
+			if(money < item2) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item2 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item2;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying pretzels. Your change is $" + change + ".");
+			
+			break;
+		
+		//Choice 3
+		case 3:
+			
+			if(money < item3) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item3 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item3;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying chewing gum. Your change is $" + change + ".");
+			
+			break;
+		
+		//Choice 4	
+		case 4:
+			
+			if(money < item4) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item4 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item4;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying mints. Your change is $" + change + ".");
+			
+			break;
+		
+		//Choice 5
+		case 5:
+			
+			if(money < item5) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item5 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item5;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying the chocolate bar. Your change is $" + change + ".");
+			
+			break;
+		
+		//Choice 6	
+		case 6:
+			
+			if(money < item6) {
+				remain = (double)((int)((remain + 0.005) * 100))/100;
+				remain = item6 - money;
+				System.out.println("You are $" + remain + " short." );
+				break;
+			}
+			else
+			change = money - item6;
+			change = (double)((int)((change + 0.005) * 100))/100;
+			System.out.println("Thanks for buying cookies. Your change is $" + change + ".");
+			
+			break;
+		
+		//Error
+		default:
+			System.out.println("Error: Invalid Choice. Please try again.");
+			
+		while (true);
+		}			
+	}
+}