如何将 while 循环转换为 for 循环？

Question

我是一名使用 Netbeans 的初学者 Java。我创建了一个代码，最初询问您的油箱中有多少加仑。然后，它将有一个 while 循环，询问您将在第一个运行中行驶多少英里以及您行驶的速度。这将在一个 while 循环中重复，直到您输入“0”以停止添加行程。我对如何将此 while 循环转换为仅使用 For 循环感到困惑。我将不胜感激。这是我的带有 while 循环的代码。

public static void main(String[] args) 
{
    Scanner input = new Scanner(System.in);
            int tank;
            double miles;
            double speed;
            double totalMiles = 0.0;
            int choice;
            double time;
            double totalTime = 0.0;
            double fuelConsumption;

            System.out.print("How many gallons of gas is in your tank (Integer 1-15)? ");
            tank = input.nextInt();
            System.out.printf("%s%d%s\n\n" , "You have ", tank , " gallons of gas in your tank.");

            System.out.print("Are you going on a trip (1 = Yes or 0 = No)? ");
            choice = input.nextInt();

            while (choice == 1)
            {
                System.out.print("How many miles are you traveling? ");     // miles 
                miles = input.nextFloat();

                System.out.print("What is your speed for this run (MPH)? ");      // speed
                speed = input.nextInt();
                System.out.print("\n");


                totalMiles = totalMiles + miles;
                time = (miles/speed);
                totalTime += (time*60);
                fuelConsumption = (20*(tank/totalMiles));

                System.out.print("Is there another leg in your trip (1 = Yes or 0 = No)? ");    // asking another leg
                choice = input.nextInt();

                if (choice == 0)
                {
                    System.out.printf("%s%5.2f%s\n","Your data for this trip is: \n"
                            + "You traveled a total of about ", totalMiles , " miles.");
                    System.out.printf("%s%.2f%s\n" , "You traveled about " , totalTime , " minutes.");

                    if (fuelConsumption >= 2)
                    {
                        System.out.println("Your car has enough gas to return.");
                        break;

                    }
                    else
                    {
                        System.out.println("Your car will need more gas to return.");
                        break;
                    }


                }
            }

}

}

Answer 1

这不是 for 循环的用例，在 for 循环中我们迭代已知数量的元素以进行已知数量的迭代。比如，重复 10 次左右。

从技术上讲，它可以用 for 循环来解决，但这有点滥用了这个概念。 while 循环非常适合该任务。

Answer 2

这不是使用 for 循环的地方，您可以像这样使用 for 循环：


printAmount = 10;

for (int i = 0; i < printAmount; i++) {

   System.out.println("Hello World"); 

}

这里您使用 for 循环来打印 "Hi" 中 printAmount 中的金额。

您的情况不同：您希望 while 循环在输入为“1”时重复，因此您使用了 WHILE 循环。

如何将 while 循环转换为 for 循环？

How do I convert my while loop to a for loop?

java

netbeans

loops