Tip计算器语句混淆

Question

这是密码。基本上，在我输入第二个客户账单金额后，它会提前给我看一条提示，并询问是否还有其他客户。我要它问我是否有其他客户，但我不希望它问有关小费，直到我输入"n“。有什么想法吗？

import java.util.Scanner;


public class H3_TipCalc {

  public static void main(String[] args) {

    Scanner input = new Scanner (System.in);
    System.out.println("Please enter your bill amount.");
    double bill = input.nextDouble();

    String multiplecust = ("Y");
    //int mc=1;

    while (multiplecust.equalsIgnoreCase("y")) 

    {


            Scanner usrin = new Scanner (System.in);

        System.out.println("Is there another customer? y or n?");
        multiplecust = usrin.nextLine();
        //mc++;



        if (multiplecust.equals("y")){
            System.out.println("Please enter their bill amount.");

            }
        else if (multiplecust.equals("n")){
            System.out.println("What tip prcentage would you like to use? Enter as a decimal.");
        }

        double tip = usrin.nextDouble();
        System.out.println("Your tip owed will be " + bill*tip + ".");
    }
  }

}

Answer 1

由于else if，您可以输入最后一个客户的账单金额或小费百分比，但不能同时输入两者。相反，尝试以下逻辑：

while( there are more individual customer amounts to enter ) {
    enter next customer amount
}

get tip percentage

show final bill

注意，提示百分比是在while循环之后输入的，因为它只是一个一次性条目。

Answer 2

你的逻辑扭曲了。

最好在循环中移动完整的逻辑，并检查是否在循环结束时退出(而不是开始)：

do
  read bill amount
  read tip amount
  read next customer
while (wants to continue)