java - 如何在此代码中使用 while 循环？

Question

我正在学习 Java The Hard Way，并且我一直坚持这个学习练习，即使用 while 循环来完成与此代码相同的操作。我想知道你们是否可以帮助我。我的大多数尝试都导致了无限的 while 循环，这是我不想要的。

import java.util.Scanner; 

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

        int current, total = 0;

        System.out.print("Type in a bunch of values and I'll ad them up. ");
        System.out.println( "I'll stop when you type a zero." );

        do
        {   
            System.out.print(" Value: ");
            current = input.nextInt();
            int newtotal = current + total;
            total = newtotal; 
            System.out.println("The total so far is: " + total);
        }while (current != 0);

        System.out.println( "Final total: " + total);

    }
}

Answer 1

一个不会改变太多代码的解决方案:

int current = -1;

while (current != 0) {
    System.out.print(" Value: ");
    current = input.nextInt();
    int newtotal = current + total;
    total = newtotal; 
    System.out.println("The total so far is: " + total);
}