我的代码一直在跳到提示而不是循环回来，我不明白为什么。我仔细阅读了所有内容，一切似乎都在起作用，但是当我尝试运行它时，我可以订购一个项目，甚至不允许我决定是否要订购其他任何东西。我是编码的初学者，所以我可能会遗漏一些明显的东西。
import java.util.*;
public class OnlineOrdersFallonBryan
{
public double value = 0;
public double cost = 0;
Scanner in = new Scanner(System.in);
public void main ()
{
System.out.println("Welcome to Vegi-Man's Online Ordering!");
boolean rightorWrong = true;
while (rightorWrong == true)
{
System.out.println("Menu:");
System.out.println("1. Vegi Burger $3.00");
System.out.println("2. Chicken-less Chicken Wings $4.00");
System.out.println("3. Fried Vegis $2.00");
System.out.println("4. Vegan Milkshake $1.50");
System.out.println("5. Double Vegi Burger $5.00");
System.out.println("6. Onion Rings $2.00");
System.out.println("7. Fried Vegi of choice $2.00");
System.out.println("8. Vegan Icecream $1.50");
System.out.println("9. Vegan Chocolate Lava Cake $4.50");
System.out.println("10. Vegan Cheese or Sauces $0.50");
System.out.println("");
System.out.println("Select a menu item: ");
double menuchoice = in.nextDouble();
if (menuchoice == 1)
{
value = cost + 3;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 2)
{
value = cost + 4;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 3)
{
value = cost + 2;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 4)
{
value = cost + 1.5;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 5)
{
value = cost + 5;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 6)
{
value = cost + 2;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 7)
{
value = cost + 2;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 8)
{
value = cost + 1.5;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 9)
{
value = cost + 4.5;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
if (menuchoice == 10)
{
value = cost + 0.5;
System.out.println();
System.out.println("Your current total is $" + cost + ".");
System.out.println("Options: ");
System.out.println("1. Order another item.");
System.out.println("2. Checkout.");
System.out.println();
System.out.println("Select an option: ");
String answer1 = in.nextLine ();
rightorWrong = answer1.equalsIgnoreCase("yes");
}
}
if (rightorWrong == false)
{
response1();
}
}
public void response1()
{
System.out.println("Subtotal (with tax): $" + value * 1.0825);
System.out.println("Tip: $");
double tip = in.nextDouble ();
double total = value + tip;
System.out.println("Final Total: $" + total);
}
}
答案 0 :(得分：0)
当我们处于此状态时，您不应该检查答案是否为“是”而是1或2，因为选项是1.订购另一个项目。和2.结帐。
您应该使用debbuger或至少使用System.out.println（）来查看程序中相关变量的值。