Question

Using Java, I created 3 files, Pizza,PizzaOrder, and PizzaOrder_Demo that I attached down below. But I cannot compile it. Could you please point out the error.The question is that

This programming project extends Q1. Create a PizzaOrder class that allows up to three pizzas to be saved in an order. Each pizza saved should be a Pizza object as described in Q1. In addition to appropriate instance variables and constructors, add the following methods:

public void setNumPizzas(int numPizzas)—sets the number of pizzas in the order. numPizzas must be between 1 and 3.

public void setPizza1(Pizza pizza1)—sets the first pizza in the order.

public void setPizza2(Pizza pizza2)—sets the second pizza in the order.

public void setPizza3(Pizza pizza3)—sets the third pizza in the order.

public double calcTotal()—returns the total cost of the order.

Write a main method to test the class. The setPizza2 and setPizza3 methods will be used only if there are two or three pizzas in the order, respectively. Sample code illustrating the methods is shown below. Note that first three lines are incomplete. You must complete them as part of the Programming Project.

Pizza pizza1 = // Code to create a large pizza, 1 cheese, 1 ham

Pizza pizza2 = // Code to create a medium pizza, 2 cheese, 2 pepperoni

PizzaOrder order = // Code to create an order

order.setNumPizzas(2); // 2 pizzas in the order

order.setPizza1(pizza1); // Set first pizza

order.setPizza2(pizza2); // Set second pizza

double total = order.calcTotal(); // Should be 18+20 = 38

//My program

class Pizza

{

private String sofpizza;

private int nofcheese,nofpepperoni,nofham;

//construtor

public Pizza(String sofpizza, int nofcheese, int nofpepperoni, int nofham)

{

this.sofpizza=sofpizza;

this.nofcheese=nofcheese;

this.nofpepperoni=nofpepperoni;

this.nofham=nofham;

}

//method

public void set_sofpizza(String l)

{

this.sofpizza=l;

}

public String get_sofpizza()

{

return sofpizza;

}

public void set_nofcheese(int b)

{

this.nofcheese=nofcheese;

}

public int get_nofcheese()

{

return nofcheese;

}

public void set_nofpepperoni(int p)

{

this.nofpepperoni=nofpepperoni;

}

public int get_nofpepperoni()

{

return nofpepperoni;

}

public void set_nofham(int h)

{

this.nofham=nofham;

}

public int get_nofham()

{

return nofham;

}

public double CalCost()

{

if(sofpizza.equalsIgnoreCase("small"))

return (10+(2*nofcheese)+(2*nofpepperoni)+(2*nofham));

else if(sofpizza.equalsIgnoreCase("medium"))

return (12+(2*nofcheese)+(2*nofpepperoni)+(2*nofham));

else

return (14+(2*nofcheese)+(2*nofpepperoni)+(2*nofham));

}

public String getDiscription

() {

return(" Size of pizza= "+sofpizza+"\n number of cheese= "+nofcheese+"\n number of pepperoni= "+nofpepperoni+"\n number of ham="+nofham);

}

}

//import java.util.Pizza;

class PizzaOrder

{

private int numPizzas;

private Pizza pizza1;

private Pizza pizza2;

private Pizza pizza3;

//constructor

public PizzaOrder(int numPizzas,Pizza pizza1,Pizza pizza2,Pizza pizza3)

{

this.numPizzas=numPizzas;

this.pizza1=pizza1;

this.pizza2=pizza2;

this.pizza3=pizza3;

}

  

public void SetNumPizzas(int numPizzas)

{

if(numPizzas>3)

this.numPizzas=3;

else if(numPizzas<1)

this.numPizzas=0;

else

numPizzas=numPizzas;

}

public int getNumpizzas()

{

return numPizzas;

}

public void setPizza1(Pizza pizza1)

{

this.pizza1=pizza1;

}

public Pizza getPizza1()

{

return pizza1;

}

public void setPizza2(Pizza pizza2)

{

this.pizza2=pizza2;

}

public Pizza getPizza2()

{

return pizza2;

}

public void setPizza3(Pizza pizza3)

{

this.pizza3=pizza3;

}

public Pizza getPizza3()

{

return pizza3;

}

public double calcTotal()

{

double total=pizza1.CalCost();

if(numPizzas>=2)

total+=pizza2.CalCost();

if(numPizzas==3)

total+=pizza3.CalCost();

return total;

}

}

  

import java.util.Scanner;

public class PizzaOrder_Demo

{

public static void main(String [] args)

{

Scanner input=new Scanner(System.in);

String size1;

int cheese1,pepp1,ham1,cheese2,pepp2,ham2,num;

System.out.println("Enter the size of pizza for pizza1 for pizza1 ");

size1=input.nextLine();

System.out.println("Enter the number of cheese toppings for pizza1");

cheese1=input.nextInt();

System.out.println("the number of pepperoni toppings for pizza1");

pepp1=input.nextInt();

System.out.println("the number of ham toppings for pizza1");

ham1=input.nextInt();

System.out.println("Enter the size of pizza for pizza1 for pizza2");

input.nextLine();

String size2;

size2=input.nextLine();

System.out.println("Enter the number of cheese toppings for pizza2");

cheese2=input.nextInt();

System.out.println("the number of pepperoni toppings for pizza2");

pepp2=input.nextInt();

System.out.println("the number of ham toppings for pizza2");

ham2=input.nextInt();

Pizza pizza1=new Pizza(size1,cheese1,pepp1,ham1);

Pizza pizza2=new Pizza(size2,cheese2,pepp2,ham2);

Pizza pizza3=new Pizza("small",0,0,0);

PizzaOrder order=new PizzaOrder(1,pizza1,pizza2,pizza3);

num=input.nextInt();

order.SetNumPizzas(num);

order.setPizza1(pizza1);

order.setPizza2(pizza2);

double total=order.calcTotal();

}

}

  

  

  

  

Answer 1

import java.util.Scanner;

public class PizzaOrder_Demo {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

String size1;

int cheese1, pepp1, ham1, cheese2, pepp2, ham2, num;

System.out.println("Enter the size of pizza for pizza1 for pizza1 ");

size1 = input.nextLine();

System.out.println("Enter the number of cheese toppings for pizza1");

cheese1 = input.nextInt();

System.out.println("the number of pepperoni toppings for pizza1");

pepp1 = input.nextInt();

System.out.println("the number of ham toppings for pizza1");

ham1 = input.nextInt();

System.out.println("Enter the size of pizza for pizza1 for pizza2");

input.nextLine();

String size2;

size2 = input.nextLine();

System.out.println("Enter the number of cheese toppings for pizza2");

cheese2 = input.nextInt();

System.out.println("the number of pepperoni toppings for pizza2");

pepp2 = input.nextInt();

System.out.println("the number of ham toppings for pizza2");

ham2 = input.nextInt();

Pizza pizza1 = new Pizza(size1, cheese1, pepp1, ham1);

Pizza pizza2 = new Pizza(size2, cheese2, pepp2, ham2);

Pizza pizza3 = new Pizza("small", 0, 0, 0);

PizzaOrder order = new PizzaOrder(1, pizza1, pizza2, pizza3);

num = input.nextInt();

order.SetNumPizzas(num);

order.setPizza1(pizza1);

order.setPizza2(pizza2);

double total = order.calcTotal();

System.out.println("The total cost is "+ total);

input.close();

}

}

class PizzaOrder {

private int numPizzas;

private Pizza pizza1;

private Pizza pizza2;

private Pizza pizza3;

// constructor

public PizzaOrder(int numPizzas, Pizza pizza1, Pizza pizza2, Pizza pizza3) {

this.numPizzas = numPizzas;

this.pizza1 = pizza1;

this.pizza2 = pizza2;

this.pizza3 = pizza3;

}

public void SetNumPizzas(int numPizzas) {

if (numPizzas > 3)

this.numPizzas = 3;

else if (numPizzas < 1)

this.numPizzas = 0;

}

public int getNumpizzas() {

return numPizzas;

}

public void setPizza1(Pizza pizza1) {

this.pizza1 = pizza1;

}

public Pizza getPizza1() {

return pizza1;

}

public void setPizza2(Pizza pizza2) {

this.pizza2 = pizza2;

}

public Pizza getPizza2() {

return pizza2;

}

public void setPizza3(Pizza pizza3) {

this.pizza3 = pizza3;

}

public Pizza getPizza3() {

return pizza3;

}

public double calcTotal() {

double total = pizza1.CalCost();

if (numPizzas >= 2)

total += pizza2.CalCost();

if (numPizzas == 3)

total += pizza3.CalCost();

return total;

}

}

class Pizza {

private String sofpizza;

private int nofcheese, nofpepperoni, nofham;

// construtor

public Pizza(String sofpizza, int nofcheese, int nofpepperoni, int nofham) {

this.sofpizza = sofpizza;

this.nofcheese = nofcheese;

this.nofpepperoni = nofpepperoni;

this.nofham = nofham;

}

// method

public void set_sofpizza(String l) {

this.sofpizza = l;

}

public String get_sofpizza() {

return sofpizza;

}

public void set_nofcheese(int b) {

this.nofcheese = b;

}

public int get_nofcheese() {

return nofcheese;

}

public void set_nofpepperoni(int p) {

this.nofpepperoni = p;

}

public int get_nofpepperoni() {

return nofpepperoni;

}

public void set_nofham(int h) {

this.nofham = h;

}

public int get_nofham() {

return nofham;

}

public double CalCost() {

if (sofpizza.equalsIgnoreCase("small"))

return (10 + (2 * nofcheese) + (2 * nofpepperoni) + (2 * nofham));

else if (sofpizza.equalsIgnoreCase("medium"))

return (12 + (2 * nofcheese) + (2 * nofpepperoni) + (2 * nofham));

else

return (14 + (2 * nofcheese) + (2 * nofpepperoni) + (2 * nofham));

}

public String getDiscription() {

return (" Size of pizza= " + sofpizza + "\n number of cheese= " + nofcheese + "\n number of pepperoni= "

+ nofpepperoni + "\n number of ham=" + nofham);

}

}

//////////////////////////////////

I put all the three files in one file and then compiled them all......

According to your program this is the output that I got..........

/////////////////////

Let me tell you all the errors that i corrected.......

public void set_nofcheese(int b) {

this.nofcheese = b;

}

//You had written

public void set_nofcheese(int b) {

this.nofcheese = nofcheese;

//Same error here..

public void set_nofpepperoni(int p) {

this.nofpepperoni = p;

}

//Same error here too

public void set_nofham(int h) {

this.nofham = h;

}

//Another error

public void SetNumPizzas(int numPizzas) {

if (numPizzas > 3)

this.numPizzas = 3;

else if (numPizzas < 1)

this.numPizzas = 0;

//You had simply given an extra else condition which wasnt needed;

//After changing that the code runs......

//Hope this helps you

Happy Coding :) :)