java - 问 : Rental Car Calculator | Use a sentinel value loop

Question

我很困惑我是否正确遵循了这一点，并且正在寻求安慰和一些帮助。所以我的主要问题是我是否遵循我的讲师问题:当他说使用哨兵值循环构建它时？

其次，如何将总计四舍五入到小数点后两位？

如果这对我的作业有帮助的话是这样的:

说明:使用哨兵值循环。

询问每个用户:

车辆类型(可以使用字符串以外的其他内容，例如:1 表示经济型，2 表示轿车等)租用天数计算(对于每个客户):

租金成本，税收，总应付款。共有三种不同的租赁选项，价格各异:经济型 @ 31.76、轿车 @ 40.32、SUV @ 47.56。 [注意:仅考虑全天单位(无小时费率)]。

销售税 = 总额的 6%。

创建摘要数据:

客户数量收集的总金额。此外，还包括 IPO、算法和案头检查值(设计文档)。

{我的设计和进展}

包yipe;

导入java.util.*;导入java.lang.Math;

公开课嗯{

int count = 0;
static int days;
static double DailyFee, NontaxTotal, CarType, Total;



public static void main(String[] args) {

    Scanner keyboard = new Scanner(System.in);

    System.out.print("What vehical would you like to rent?\n");
    System.out.println("Enter 1 for an economy car\n");
    System.out.println("Enter 2 for a sedan car\n");
    System.out.println("Enter 3 for an SUV");
    CarType = keyboard.nextInt();
    if (CarType == 1)
          DailyFee=31.76;
        else if(CarType == 2)
          DailyFee=40.32;
        else if(CarType == 3)
          DailyFee=43.50;

    System.out.print("Please enter the number of days rented. (Example; 3) : ");
    days = keyboard.nextInt();

    NontaxTotal = (DailyFee * days);
    Total = (NontaxTotal * 1.06);







    System.out.printf("The total amount due is $" + Total);

}

}

Answer 1

布兰登，没有哨兵循环。在我看来，这就是您想要的程序，

import java.util.*;

public class Stack3{
public static void main(String []args){
    int count=0;
    int days;
    double DailyFee=0, NontaxTotal, CarType, Total,FullTotal=0;
    Scanner in=new Scanner(System.in);
    System.out.println("If there are any customer press 1 else press 0");
    int cus=in.nextInt();
    // this is sentinel loop
    while(cus!=0){
        count++;
        System.out.print("What vehical would you like to rent?\n");
        System.out.println("Enter 1 for an economy car\n");
        System.out.println("Enter 2 for a sedan car\n");
        System.out.println("Enter 3 for an SUV");
        CarType = in.nextInt();
        if (CarType == 1)
              DailyFee=31.76;
        else if(CarType == 2)
              DailyFee=40.32;
        else if(CarType == 3)
              DailyFee=43.50;

        System.out.print("Please enter the number of days rented. (Example; 3) : ");
        days = in.nextInt();
        double x=days;
        NontaxTotal = (DailyFee * x);
        Total = (NontaxTotal * 1.06);
        FullTotal+=Total;
        //included 2 decimals only
        System.out.printf("The total amount due is $ %.2f \n",Total);

        System.out.println("If there are any customer press 1 else press 0");
        cus=in.nextInt();
    }
    System.out.println("Count of customers :- "+count);
    System.out.printf("Total of the Day :- %.2f",FullTotal);
}
}