Thread: Mind is going to burst with this code!!!

Ive to write a software program that allows a user to order groceries?

Ive to ask for the users details names, address etc.

I have to ask the user to input their grocery item and then the quantity for 3 items only.

and then add up the total cost and output the total cost to the screen.

I have done the following but getting 3 errors I cant figure it out as Im only after starting to learn Java.


import java.util.Scanner;

class Grocery1
{
public static void main(String[]args)
{
Scanner in = new Scanner (System.in);
// User details input needed. String variables.


String name;
String address;
String creditCardNum;
String expiryDate;
String dob;
String email;
String email2;

System.out.println("Please enter your Full Name ");{
name = in.nextLine();}
System.out.println("Please enter your Address ");{
address = in.nextLine();}
System.out.println("Please enter your Credit Card Number ");{
creditCardNum = in.nextLine();}
System.out.println("Please enter your Credit Card Expiry Date in 00/00 format ");{
expiryDate = in.nextLine();}
System.out.println("Please enter your Date of Birth in 00/00/00 format ");{
dob = in.nextLine();}
System.out.println("Please enter your email address ");{
email = in.nextLine();}
System.out.println("Please re enter your email address ");{
email2 = in.nextLine();}

//confirm the email

if(email.equals(email2)){
System.out.println(" Thank your email confirmation successful");}
else
{System.out.println(" Sorry you have entered the wrong email");}

Scanner grocery1Item = new Scanner (System.in);


String grocery1;
int grocery1Amt;
double grocery1Cost;


System.out.print("Please enter the first grocery item " );
grocery1 = grocery1Item.nextLine();

System.out.print("Please enter the amount ");
grocery1Amt = grocery1Item.nextInt();




if(grocery1.equalsIgnoreCase("apples")){
grocery1Cost = 0.30 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else if(grocery1.equalsIgnoreCase("oranges")){
grocery1Cost = 0.45 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else if(grocery1.equalsIgnoreCase("strawberries")){
grocery1Cost = 2.30 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else if(grocery1.equalsIgnoreCase("potatoes")){
grocery1Cost = 3.25 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else if(grocery1.equalsIgnoreCase("turnips")){
grocery1Cost = 0.70 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else if(grocery1.equalsIgnoreCase("carrots")){
grocery1Cost = 1.25 * grocery1Amt;
System.out.println("The total cost for Item 1 is €" + grocery1Cost);}
else{
System.out.print(" You have entered an Invalid Item ");}


Scanner grocery2Item = new Scanner (System.in);


String grocery2;
int grocery2Amt;
double grocery2Cost;


System.out.print("Please enter the second grocery item " );
grocery2 = grocery2Item.nextLine();

System.out.print("Please enter the amount ");
grocery2Amt = grocery2Item.nextInt();




if(grocery2.equalsIgnoreCase("apples")){
grocery2Cost = 0.30 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else if(grocery2.equalsIgnoreCase("oranges")){
grocery2Cost = 0.45 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else if(grocery2.equalsIgnoreCase("strawberries")){
grocery2Cost = 2.30 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else if(grocery2.equalsIgnoreCase("potatoes")){
grocery2Cost = 3.25 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else if(grocery2.equalsIgnoreCase("turnips")){
grocery2Cost = 0.70 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else if(grocery2.equalsIgnoreCase("carrots")){
grocery2Cost = 2.25 * grocery2Amt;
System.out.println("The total cost for Item 2 is €" + grocery2Cost);}
else{
System.out.print(" You have entered an Invalid Item ");}







Scanner grocery3Item = new Scanner (System.in);


String grocery3;
int grocery3Amt;
double grocery3Cost;



System.out.print("Please enter the third grocery item ");
grocery3 = grocery3Item.nextLine();

System.out.print("Please enter the amount ");
grocery3Amt = grocery3Item.nextInt();




if(grocery3.equalsIgnoreCase("apples")){
grocery3Cost = 0.30 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else if(grocery3.equalsIgnoreCase("oranges")){
grocery3Cost = 0.45 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else if(grocery3.equalsIgnoreCase("strawberries")){
grocery3Cost = 3.30 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else if(grocery3.equalsIgnoreCase("potatoes")){
grocery3Cost = 3.35 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else if(grocery3.equalsIgnoreCase("turnips")){
grocery3Cost = 0.70 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else if(grocery3.equalsIgnoreCase("carrots")){
grocery3Cost = 3.35 * grocery3Amt;
System.out.println("The total cost for Item 3 is €" + grocery3Cost);}
else{
System.out.print(" You have entered an Invalid Item ");}
{


System.out.println("The total order cost is €" + grocery1Cost + grocery2Cost + grocery3Cost);}




}
}

Error: variable grocery1Cost might not have been initialized
Error: variable grocery2Cost might not have been initialized
Error: variable grocery3Cost might not have been initialized


Please help!!

Since those variables are initialized within if blocks, there's a chance that all if conditions will be false, and the variables will be used (in the System.out.println(...)) before they've been given a valid value. A solution is to give these variables a default value when you declare them, something that makes sense, perhaps 0.0. for instance.

From the compiler's point of view there is no guarantee that any of these three variables is ever assigned a value.

To get the program to compile so that you can start debugging, just initialize each of them to 0.0 when it is declared.


Cheers!

Z

had same problem other day shoulda known silly me!! thank you so much i feel like crying with relief!!!