1 package text1; 2  3 import java.util.Scanner; 4  5 public class text11 { 6 public static void main(String[] args){ 7      8     Scanner sc =new Scanner(System.in); 9     10     11     System.out.print("输入圆的半径");12     int a =sc.nextInt();13     14     15     System.out.print("圆的周长是；"+a*2*3.14+"圆的面积是；"+a*a*3.14);16     17 }18 }