我的Do-While回圈不檢查我的狀況？

我正在使用以下代碼在選單上訂購以下方法：

   public static double menu_received() {

        Scanner input = new Scanner(System.in);
        int userResponse, total = 0;

        do {

            System.out.println();
            System.out.println("Here is our menu:");
            System.out.println("1. Bulgogi -- $15.00");
            System.out.println("2. Kalbi -- $18.00");
            System.out.println("3. Kimchi Fried Rice -- $16.00");
            System.out.println("Please choose one option at one time using the number (0 to end the order):");

            userResponse = input.nextInt();
            System.out.println("User Menu choice is "   userResponse);

            if (userResponse == 1) {
                System.out.println("Thank you for ordering Bulgogi");
                total = total   15;
                System.out.println("Your total is $"   total);
            }

            if (userResponse == 2) {
                System.out.println("Thank you for ordering Kalbi");
                total = total   18;
                System.out.println("Your total is $"   total);
            }

            if (userResponse == 3) {
                System.out.println("Thank you for ordering Kimichi Fried Rice");
                total = total   16;
                System.out.println("Your total is $"   total);
            }

        } while (userResponse != 0);

        double total2 = total   2.55;
        // total = (double) total   2.55;
        System.out.println("Your total after tax is $"   total2);

        return total2;
    }

但是，我遇到的問題是，當我呼叫它時，它沒有按我想要的那樣回應。即使在我輸入 0 后，它也不會停止呼叫選單。在 while(userResponse != 0) 中我的條件是否有問題有人可以向我解釋為什么以及如何糾正它？謝謝

這是我的輸出：

>
Here is our menu:
1. Bulgogi -- $15.00
2. Kalbi -- $18.00
3. Kimchi Fried Rice -- $16.00
Please choose one option at one time using the number (0 to end the order):
1
User Menu choice is 1
Thank you for ordering Bulgogi
Your total is $15

Here is our menu:
1. Bulgogi -- $15.00
2. Kalbi -- $18.00
3. Kimchi Fried Rice -- $16.00
Please choose one option at one time using the number (0 to end the order):
1
User Menu choice is 1
Thank you for ordering Bulgogi
Your total is $30

Here is our menu:
1. Bulgogi -- $15.00
2. Kalbi -- $18.00
3. Kimchi Fried Rice -- $16.00
Please choose one option at one time using the number (0 to end the order):
0
User Menu choice is 0
Your total after tax is $32.55

Here is our menu:
1. Bulgogi -- $15.00
2. Kalbi -- $18.00
3. Kimchi Fried Rice -- $16.00
Please choose one option at one time using the number (0 to end the order):
0
User Menu choice is 0
Your total after tax is $2.55

PS：不要介意“您的稅后總額為XXXX”的說法-它來自另一種方法。

uj5u.com熱心網友回復：

如果我理解您上面的評論，請將您的主要內容更改為：

menu_received(); // First call
System.out.println("Value of menu_received : "   menu_received()); // Second call
tip_calculator(menu_received()); // Third call

到 ：

double result = menu_received(); // Only one call
System.out.println("Value of menu_received : "   result);
tip_calculator(result);

標籤：爪哇 while 循环 条件语句 边做边做

上一篇：將https添加到陣列的缺失字串？

下一篇：帶鎖的Java條件