第四周作业-键盘输入数据 和 数据类型

public class ComputeArea {public static void main(String args[]){final double PI=3.14159;double area;area=PI*10*10;System.out.println("The area for the circle of 10 is"+area);}}

import java.util.Scanner;public class C {public static void main(String args[]){final double PI=3.14159;double area;double radius=0.0;Scanner sc=new Scanner (System.in);while(sc.hasNextDouble());radius=sc.nextDouble();area=PI*radius*radius;System.out.println("The area for the circle of 10 is"+area);sc.close();}}