Java 糖果机

请帮助解决我遇到的以下代码（我是java新手） 作业上说我需要用代码造一台电脑糖果机。 以下是作业的输出：

Welcome to Shoreline's Computer Candy Machine!
(All candy provided is virtual.)

How much money do you have? > $1.00
$1.00, that's all?

Well, let me tell you what we got here.
A $0.65 Twix
B $0.50 Chips
C $0.75 Nutter Butter
D $0.65 Peanut Butter Cup
E $0.55 Juicy Fruit Gum

So, What do you want? > C

Thanks for purchasing candy through us.
Please take your candy and your $0.25 change!

或：

这是我的代码（我还没有完成）：

---

我陷入了

verse4（）

的困境。我是说我做对了吗？我如何在

verse2（）

中提取“钱”并在

verse4（）

中使用它，或者我应该怎么做？请帮帮我。

在我看来，第2节中的变量

money

超出了第4节的范围。 如果在方法中定义变量，则该变量仅存在于该方法中。如果你写下：

double money;

就在你们班的开始括号下面，然后换

double money = console.nextDouble();

在第2至第2段中：

money = console.nextDouble();

---

您需要将

money

变量声明为全局变量，以便可以在任何地方访问它。而且它需要是静态的，因为您的方法都是静态的。我确实启动了你的代码> VIESE4（）/Case>方法，唯一需要考虑的是，如果用户没有足够的钱…会发生什么？这就是为什么

else{…}

被注释为家庭作业；）！另外，您必须知道

=

和

之间的区别。它们在你的计划中至关重要。祝你好运

static double money;//must be a global variable so it could be accessed from all methods.
    //you declared it in verse2() method what means that you can ONLY access it in verse2().

    public static void main(String[] args) {
        verse1();
        System.out.println();
        verse2();
        System.out.println();
        verse3();
        System.out.println();
        verse4();
    }

    public static void verse1() {
        System.out.println("Welcome to Shoreline's Computer Candy Machine!");
        System.out.println("(All candy provided is virtual.)");
    }

    public static void verse2() {
        Scanner console = new Scanner(System.in);
        System.out.print("How much money do you have? >"); //prompts for a whole number
        money = console.nextDouble();
        System.out.printf("%.2f, that's all?", money);
    }

    public static void verse3() {
        System.out.println("Well, let me tell you what we got here.");
        System.out.println("A $0.65 Twix");
        System.out.println("B $0.50 Chips");
        System.out.println("C $0.75 Nutter Butter");
        System.out.println("D $0.65 Peanut Butter Cup");
        System.out.println("E $0.55 Juicy Fruit Gum");
    }

    public static void verse4() {
        Scanner input = new Scanner(System.in);
        System.out.print("So, What do you want? >"); //prompts for a whole number
        String a = input.next();
        double change = 0;//the amount of change to give back.
        //check which candy they picked as well as if the money is equal or larger than the price.
        //not the >= is very important, you only had >.
        if (a.equals("A") && money >= 0.65) {
            change = money - 0.65;//calculate the change by doing the money - price of candy.
            System.out.println("Thanks for purchasing candy through us.");
            System.out.println("Please take your candy and your $" + change + " change!");
        } else if (a.equals("B") && money >= 0.50) {//same thing for item B, and check the price
            change = money - 0.50;
            System.out.println("Thanks for purchasing candy through us.");
            System.out.println("Please take your candy and your $" + change + " change!");
        }//now do items C,D,E in with the same logic.
        //now you need to make sure that maybe the user doesn't have enough money...
        //you would you the else{...} to prompt to user that the money is not enough.
    }

money = console.nextDouble();

static double money;//must be a global variable so it could be accessed from all methods.
    //you declared it in verse2() method what means that you can ONLY access it in verse2().

    public static void main(String[] args) {
        verse1();
        System.out.println();
        verse2();
        System.out.println();
        verse3();
        System.out.println();
        verse4();
    }

    public static void verse1() {
        System.out.println("Welcome to Shoreline's Computer Candy Machine!");
        System.out.println("(All candy provided is virtual.)");
    }

    public static void verse2() {
        Scanner console = new Scanner(System.in);
        System.out.print("How much money do you have? >"); //prompts for a whole number
        money = console.nextDouble();
        System.out.printf("%.2f, that's all?", money);
    }

    public static void verse3() {
        System.out.println("Well, let me tell you what we got here.");
        System.out.println("A $0.65 Twix");
        System.out.println("B $0.50 Chips");
        System.out.println("C $0.75 Nutter Butter");
        System.out.println("D $0.65 Peanut Butter Cup");
        System.out.println("E $0.55 Juicy Fruit Gum");
    }

    public static void verse4() {
        Scanner input = new Scanner(System.in);
        System.out.print("So, What do you want? >"); //prompts for a whole number
        String a = input.next();
        double change = 0;//the amount of change to give back.
        //check which candy they picked as well as if the money is equal or larger than the price.
        //not the >= is very important, you only had >.
        if (a.equals("A") && money >= 0.65) {
            change = money - 0.65;//calculate the change by doing the money - price of candy.
            System.out.println("Thanks for purchasing candy through us.");
            System.out.println("Please take your candy and your $" + change + " change!");
        } else if (a.equals("B") && money >= 0.50) {//same thing for item B, and check the price
            change = money - 0.50;
            System.out.println("Thanks for purchasing candy through us.");
            System.out.println("Please take your candy and your $" + change + " change!");
        }//now do items C,D,E in with the same logic.
        //now you need to make sure that maybe the user doesn't have enough money...
        //you would you the else{...} to prompt to user that the money is not enough.
    }