Question

以下是我的代码......我正在尝试制作一个倒数计时器。现在它在按正确的顺序倒计时方面正常工作。我试图弄清楚如何在代码中放置一个if语句，以便打印1分钟和'秒，而不是1分钟和'秒'

import java.util.Scanner;

public class countdown {

public static void main(String[] args) {

    Scanner scan = new Scanner(System.in);
    int minutes;
    System.out.println("Please enter the timer countdown in minutes:");
    minutes = scan.nextInt();

    while (minutes < 1) {
        System.out.print("Invalid entry: Enter 1 or more minutes: ");
        minutes = scan.nextInt();
    }
    for (int i = minutes - 1; i >= 0; i--)

    {
        for (int s = 59; s >= 1; s--)

            System.out.println(i + " minutes, " + s + " seconds");
        System.out.println("The timer is done!");

    }

}

}

Answer 1

像这样，

String minutes = i + (i > 1 ? " minutes" : " minute"); // put this line in outer loop
String seconds = s + (s > 1 ? " seconds" : " second"); // and this line in inner loop

System.out.println(minutes +", "+ seconds);

Answer 2

只需在其中添加if / else语句：

for (int i = minutes - 1; i >= 0; i--){
    String minute;
    if(minutes == 1)
        minute = " minute ";
    else
        minute = " minutes ";

    for (int s = 59; s >= 1; s--){
        String seconds;
        if(s == 1)
            seconds = " second";
        else
            seconds = " second";
        System.out.println(i + minute + s + seconds);
    }
}

另一个答案可能更好，但它使用不同的语法，使所有这些代码成为一个短线。他们做的基本相同。

Answer 3

这两个if / else语句应该有效。

for (int s = 59; s >= 1; s--)
    {
        if (i == 1)
            System.out.print(i + " minute, ");
        else
            System.out.print(i + " minutes, ");
        if (s == 1)
            System.out.println(s + " second");
        else 
            System.out.println(s + " seconds");
    }

Java if / for循环辅助

3 个答案: