Question

这是代码。基本上在我输入第二个客户账单金额后，它会过早地给我一个小费，并询问是否有另一个客户。我想让它问我是否有其他客户，但我不想让它询问提示，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

你的逻辑扭曲了。

更好地移动循环内的完整逻辑并检查其末尾的退出（不是开始）：

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

Answer 2

由于else if，您可以输入最后一个客户的帐单金额或小费百分比，但不能同时输入两者。相反，尝试这个逻辑：

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

get tip percentage

show final bill

请注意，在while循环之后输入提示百分比，因为它只是一次性输入。

提示计算器语句混乱

2 个答案: