Javabat 帮助 : alarmClock

Question

我正在解决 JavaBat 问题并且对我的逻辑感到困惑。

这是任务:

Given a day of the week encoded as 0=Sun, 1=Mon, 2=Tue, ...6=Sat, and a boolean indicating if we are on vacation, return a string of the form "7:00" indicating when the alarm clock should ring. Weekdays, the alarm should be "7:00" and on the weekend it should be "10:00". Unless we are on vacation -- then on weekdays it should be "10:00" and weekends it should be "off".

alarmClock(1, false) → "7:00" alarmClock(5, false) → "7:00" alarmClock(0, false) → "10:00"

这是我的代码:

            public String alarmClock(int day, boolean vacation) {
                if ( (day >=1 && day <=5) && (!vacation)) {
                    return "7:00";
                } else if ( (day >=1 && day <=5) && (vacation)) {
                    return "10:00";  
                } else {
                return "off";
                }  
            }

为什么这两个测试失败？

alarmClock(0, false) → "10:00""off"X
alarmClock(6, false) → "10:00""off"X

当然，这条线涵盖了它？

if (day >=1 && day <=5) && (!vacation))

Answer 1

这个怎么样？

      public String alarmClock(int day, boolean vacation) {
            if (day >=1 && day <=5) {
                return vacation ? "10:00" : "7:00";
            } else {
                return vacation ? "off" : "10:00";
            }  
        }

请注意，这取决于您的编码约定是否允许使用 Turnary 运算符。但在这种情况下，我认为逻辑更容易阅读。