很基本的一个程序,勿喷!
/**
*请比较以下两个程序的区别,说出为什么会有差异?
*
*/
import java.util.Scanner;
class Test1
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
final double PI = 3.14159;
System.out.print("Enter the radius and length of a cylinder: ");
double radius = input.nextDouble();
double length = input.nextDouble();
double area = radius * radius * PI;
System.out.println("The area is "+area);
System.out.println("The volume is "+area*length);
}
}
/*
import java.util.Scanner;
class Test1
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
final double PI = 3.14159;
System.out.print("Enter the radius and length of a cylinder: ");
double radius = input.nextDouble();
double length = input.nextDouble();
double area = radius * radius * PI;
double volume = area * length;
System.out.println("The area is "+area);
System.out.println("The volume is "+volume);
}
}
*/ |