java - 瓶啤酒

Question

我尝试制作一个卡在墙上的啤酒瓶版本，这对很多人来说都是基本的。

这就是我所拥有的，但我不明白为什么我没有得到任何输出？

如有任何帮助，我们将不胜感激。谢谢

public class PeopleInARoom
{

    public static void main(String[] args) {
        int humanNum = 10;
        String word = "people";

        while (humanNum < 0) {

            if (humanNum == 1) {
                word = "person"; //singular, as in one person.
            }

            System.out.println(humanNum + " " + word + "people in a room");
            System.out.println("Wait...somebody left!");
            humanNum = humanNum - 1;

            if (humanNum > 0) {
                System.out.println(humanNum + " " + word + "people in a room");
            } else {
                System.out.println("Hey, where has everybody gone?");
            }
        }
    }
}

Answer 1

你有:

int humanNum = 10;

你的条件是while(humanNum < 0) {...} 。 condition永远不会满足，所以什么也不会发生。