Question

Write a Java program

1-)write a program that simulates a vending machine, takes input from the user (money), and returns the change to the user.

The change means

Quarter =   25 cent

Dime = 10 cent

Nickels = 5 cent

Pinneies = 1 cent

2-) What is the output produced by the following code?

• int result = 11;
• result /= 2;
• System.out.println("resu lt is " + result);

Answer 1

1.

Since you have not provided what options does the vending machine should have, I have taken the liberty to use my own set of examples.

Code:

import java.util.*;
import java.io.*;
class Main{
public static void main(String[] args) {
    int Food = runMenu();
    int Price = retrievePrice(Food);
    int change = moneyInserted(Price);
    changeOut(change);
}

public static int runMenu(){
    Scanner keyboard = new Scanner(System.in);
    int choice = 0 ;
    System.out.println("\n\nPlease enter your selection:"
                + "\n1: Snickers \t 125"
                + "\n2: Reeses Cup \t 130"
                + "\n3: Doritoes \t 150"
                + "\n4: Pepsi \t\t 185"
                + "\n5: Exit ");
    choice = keyboard.nextInt();
    return choice;        
}

public static int retrievePrice(int menuChoice){
    if (menuChoice == 1)
        return 125;
    if (menuChoice == 2)
        return 130;
    if (menuChoice == 3)
        return 150;
    if (menuChoice == 4)
        return 185;
    else return 0;
}

public static int moneyInserted(int Price){
    Scanner keyboard = new Scanner(System.in);
    int money = 0;
    System.out.println("Your item costs: " + Price + "\nPlease enter the amount of money:");
    money = keyboard.nextInt();
    while (money < Price){
        System.out.println("Please insert sufficient funds");
        money = money + keyboard.nextInt();
    }
    return money - Price ;
}
public static void changeOut(int change){
    int quarters = 0;
    int dimes = 0;
    int nickels = 0;
    while (change >= 25){
        quarters = quarters + 1;
        change = change - 25;
    }
    while (change >= 10){
        dimes = dimes + 1;
        change = change - 10;
    }
    while (change >= 5){
        nickels = nickels + 1;
        change = change - 5;
    }

    System.out.printf("\nHere's your change:\n%d quarters, %d dimes, %d nickels and %d pennies!",
        quarters, dimes, nickels, change);
}
}

2.

The result will be 5 as a is an integer type variable so its division only gives the quotient value.