用java编写一个基本的汽车租赁程序/问题

问题描述 投票：0回答：4

所以我非常困惑，只是寻求帮助：L。这就是我导师的指示。

说明： 使用哨兵值循环。

询问每位用户：

  • 车辆类型（可以使用字符串以外的其他内容，例如：1 经济型、轿车 2 等）
  • 租用天数

计算（对于每个客户）：

  • 租金，
  • 税收，
  • 应付款总额。

共有三种不同的租赁选项，价格各不相同：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：

  • 顾客数量
  • 收集的总金额。

此外，还包括 IPO、算法和案头检查值（设计文件）。

{我要做什么和我的问题}

package yipe;

public class Umm {

    import java.util.*;

    int count = 0;
    static int CarType, days;
    static double DailyFee, 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=(int)31.76;
            else if(CarType == '2')
              DailyFee=(int)40.32;
            else if(CarType == '3')
              DailyFee=(int)43.50;

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

        Total = (DailyFee * days * 6/100);

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

    }


}
  1. 如何修复 IF 语句以获得正确的数学结果？
  2. 我如何让它循环输入多个信息？
  3. 如何制作汇总数据？
  4. 如何将总计四舍五入到小数点后两位？
java loops if-statement summary sentinel
4个回答
1
投票

请注意，

'1'
实际上是字符
1
，而不是整数1
。他们实际上非常不同。

在 Java（以及 C#）中，

int

 和
char
 类型可以相互转换。

为了说明这一点，下面实际上打印了 49：

public class HelloWorld { public static void main(String[] args) { System.out.print((int)'1'); } }
同样，以下打印

true

：

System.out.println('1' == 49);
如您所见，字符被隐式转换为等效的

int

 值。

要了解为什么

'1'

 特别等于 49，请查看字符的表示方式。特别是，查看
ASCII 图表（这是字符编码的常见约定） - 结果表明字符 '1'
 是 ASCII 49。事实上，我们可以“反向”执行与上面相同的操作将 ASCII 49“转换”为其等效字符，下面的行将打印
1
:

System.out.println((char)49);
要了解这种转换的工作原理，您可能需要阅读

评论中链接的这篇相当优秀的文章。如果您对 C# 中的工作原理感到好奇，您可能还想阅读这个问题。

还有一点：当您执行

DailyFee=(int)31.76

 时，将其转换为
int
 实际上会“丢弃”小数点后的所有内容，因此这与编写
DailyFee = 31
 没有什么不同。这是因为 31 是整数，而 31.76
不是（它是有理数）。

一个小风格点：您可以考虑在这里使用

switch

 语句。

0
投票
package demo; import java.util.Scanner; public class Carrentals { public static void main(String[] args) { Double a,b,c,d,e ; Scanner sc= new Scanner(System.in); System.out.println("Enter the number of days for rent"); a=sc.nextDouble(); System.out.println("Select the type of vehicle"); c=1000*a; d=1500*a; e=2000*a; System.out.println("Press 1 for SUV"); System.out.println("Press 2 for SEDEN"); System.out.println("Press 3 for ECONOMICAL"); b=sc.nextDouble(); if(b == 1) System.out.println("The rent is "+c); else if(b == 2) System.out.println("The rent is "+d); else if(b == 3) System.out.println("The rent is "+e); sc.close(); } }
0
投票
package demo; import java.util.Scanner; public class carrent { public static void main(String[] args) { System.out.println("SELECT THE TYPE OF VEHICLE"); System.out.println("PRESS 1 FOR SUV"); System.out.println("PRESS 2 FOR SEDAN"); System.out.println("PRESS 3 FOR ECONOMICAL"); Scanner sc=new Scanner(System.in); char z=sc.next().charAt(0); switch(z) { case'1': System.out.println("YOU HAVE SELECTED SUV"); Scanner suv=new Scanner(System.in); System.out.println("ENTER THE NUMBER OF DAYS"); int a=suv.nextInt(); int rent1=1000*a; int rent2=750*a; System.out.println("SELECT THE CLASS OF VEHICLE"); System.out.println("PRESS 1 FOR AC"); System.out.println("PRESS 2 FOR NON AC"); int b=suv.nextInt(); if(b==1) System.out.println("THE RENT FOR " +a+ " DAYS FOR SUV AC IS " +rent1+ " Rupees"); else if(b==2) System.out.println("THE RENT FOR " +a+ " DAYS FOR SUV NON AC IS " +rent2+ " Rupees"); break; case'2': System.out.println("YOU HAVE SELECTED SEDAN"); Scanner SEDAN=new Scanner(System.in); System.out.println("ENTER THE NUMBER OF DAYS"); int a1=SEDAN.nextInt(); int rent1S=1500*a1; int rent2S=12000*a1; System.out.println("SELECT THE CLASS OF VEHICLE"); System.out.println("PRESS 1 FOR AC"); System.out.println("PRESS 2 FOR NON AC"); int b1=SEDAN.nextInt(); if(b1==1) System.out.println("THE RENT FOR " +a1+ " DAYS FOR SEDAN AC IS " +rent1S+ " Rupees"); else if(b1==2) System.out.println("THE RENT FOR " +a1+ " DAYS FOR SEDAN NON AC IS " +rent2S+ " Rupees"); break; case'3': System.out.println("YOU HAVE SELECTED ECONOMICAL"); Scanner ECONOMICAL=new Scanner(System.in); System.out.println("ENTER THE NUMBER OF DAYS"); int a2=ECONOMICAL.nextInt(); int rent1E=2000*a2; int rent2E=1700*a2; System.out.println("SELECT THE CLASS OF VEHICLE"); System.out.println("PRESS 1 FOR AC"); System.out.println("PRESS 2 FOR NON AC"); int b2=ECONOMICAL.nextInt(); if(b2==1) System.out.println("THE RENT FOR " +a2+ " DAYS FOR SUV AC IS " +rent1E+ " Rupees"); else if(b2==2) System.out.println("THE RENT FOR " +a2+ " DAYS FOR SUV NON AC IS " +rent2E+ " Rupees"); break; default: System.out.println("ERROR!!!"); System.out.println("PLEASE SELECT BASED ON ABOVE GIVEN INSTRUCTIONS"); } sc.close(); 
}
}

    



    

    
    
    

    

        

            

                

                    
0
投票

                    
                

            

        

        
导入java.time.LocalDate；
导入 java.time.temporal.ChronoUnit;


公共课汽车{


public String carModel;
public String registrationNumber;
public double rentalRatePerDay;
public boolean availability;
public LocalDate rentalStartDate;

public Car(String carModel, String registrationNumber, double rentalRatePerDay, boolean isAvailability) {
    this.carModel = carModel;
    this.registrationNumber = registrationNumber;
    this.rentalRatePerDay = rentalRatePerDay;
    this.availability = true;
}

public String getCarModel() {
    return carModel;
}

public void setCarModel(String carModel) {
    this.carModel = carModel;
}

public String getRegistrationNumber() {
    return registrationNumber;
}

public void setRegistrationNumber(String registrationNumber) {
    this.registrationNumber = registrationNumber;
}

public double getRentalRatePerDay() {
    return rentalRatePerDay;
}

public void setRentalRatePerDay(double rentalRatePerDay) {
    this.rentalRatePerDay = rentalRatePerDay;
}

public boolean isAvailability() {
    return availability;
}

public void setAvailability(boolean isAvailability) {
    this.availability = isAvailability;
}

// Method to rent the car
public boolean rentCar(LocalDate startDate) {
    if (availability) {
        this.availability = false;
        this.rentalStartDate = startDate;
        return true; // Car rented successfully
    } else {
        return false; // Car is not available
    }
}

// Method to return the car
public double returnCar(LocalDate returnDate) {
    if (!availability && rentalStartDate != null) {
        long numberOfDays = ChronoUnit.DAYS.between(rentalStartDate, returnDate);
        if (numberOfDays < 0) {
            numberOfDays = 0; // Handle case where return date is before rental start date
        }
        this.availability = true; // Car is now available
        this.rentalStartDate = null; // Reset the rental start date
        return numberOfDays * rentalRatePerDay; // Calculate total rental charges
    } else {
        return 0.0; // Car was not rented, no charges
    }
}

// Method to display rental charges
public void displayRentalCharges(LocalDate returnDate) {
    if (!availability && rentalStartDate != null) {
        double charges = returnCar(returnDate); // Use returnCar to calculate charges
        System.out.printf("Total rental charges for %s (%s) from %s to %s: $%.2f%n", carModel, registrationNumber,
                rentalStartDate, returnDate, charges);
    } else {
        System.out.println("Car has not been rented or already returned.");
    }
}

public static void main(String[] args) {

}

}

    

	

    

    


  

  

    
最新问题


  





  

    © www.soinside.com 2019 - 2024. All rights reserved.