Question

好的继承人我的任务问题

创建一个名为DrivingCost的Java程序，提示用户输入驾驶距离，汽车的燃油效率（英里/加仑）和每加仑的价格，然后显示行程的成本：

我应该得到$ 81.40的结果，但我一直得到$ 81.39 我如何围绕那一分钱？

这是我的代码

 import java.util.Scanner;

 public class DrivingCost
 {
      public static void main(String[] args)
      {
       Scanner input = new Scanner(System.in);

         System.out.print("Enter the driving distance: ");
         double distance = input.nextDouble();
         System.out.print("Enter miles per gallon: ");
         double mpg = input.nextDouble();
         System.out.print("Enter price per gallon: ");
         double ppg = input.nextDouble();
         double cost = distance / mpg * ppg;

         System.out.println("The cost of driving is $" + (int)(cost * 100) / 100.0);
      }
 }

Answer 1

...试

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;

public class DrivingCost
{
     public static void main(String[] args)
     {
      Scanner input = new Scanner(System.in);

        System.out.print("Enter the driving distance: ");
        double distance = input.nextDouble();
        System.out.print("Enter miles per gallon: ");
        double mpg = input.nextDouble();
        System.out.print("Enter price per gallon: ");
        double ppg = input.nextDouble();
        double cost = (distance / mpg) * ppg;
        input.close();
        NumberFormat df = DecimalFormat.getCurrencyInstance(Locale.US);
        System.out.println("The cost of driving is " + df.format(cost));
     }
}

四舍五入到最近的便士

1 个答案: