Java作业 输入圆的半径计算输出圆的周长和面积

 package text1;

 import java.util.Scanner;

 public class text11 {
 public static void main(String[] args){

     Scanner sc =new Scanner(System.in);

     System.out.print("输入圆的半径");
     int a =sc.nextInt();

     System.out.print("圆的周长是；"+a*2*3.14+"圆的面积是；"+a*a*3.14);

 }
 }