Question

我正在尝试一项计划挑战，该计划挑战需要输入空气，水或钢，并显示Java中以英尺为单位的声音传播速度。

我的驱动程序代码如下所示

import java.util.Scanner;

public class driver
{
public static void main(String[] args)
{
String type;
int distance;
int time = 0;

    Scanner keyboard = new Scanner(System.in);

System.out.print("Input one of the following- Air, water, or steel.");
        type = keyboard.nextLine();

System.out.print("Input distance in feet");
        distance = keyboard.nextInt();

        speedofsound sound = new speedofsound(distance);

        if (type.equals("Air"))
    time = sound.getSpeedInAir();
        System.out.println(time);
        if (type.equals("Water"))
    time = sound.getSpeedInWater();

        if (type.equals("Steel"))
    time = sound.getSpeedInSteel();

        System.out.println("The time it would take for"  + type + "to travel" + distance + "feet is" + time);
 }
}

，班级看起来像这样

public class speedofsound {// class stating
private int distance;//distance integer
private int time;

public speedofsound (int d)
{
    distance = d; // from driver pass over dist in ft, 
}

public int getSpeedInAir()

{
return  (distance / 1100);

}
public int getSpeedInWater()

{
time = distance / 4900;
return time;
}
public int getSpeedInSteel()

{
time = distance / 16400;
return time;
 }
}

当我在控制台中执行此操作时，我得到“输入以下内容之一 - 空气，水或钢。空气输入距离（英尺）50 0 Airto travel50feet需要的时间是0“ 无论我输入什么，我都会得到0.什么东西？

返回0的入门Java数学程序

0 个答案: