java scanner输入，控制台输出。输入圆的半径，计算圆的周长和面积

Posted 2023-04-17

import java.util.Scanner;

public class TestCircle

public static void main(String[] args)
// TODO Auto-generated method stub
Scanner sc = new Scanner(System.in);
System.out.println("请输入圆的半径");
int radius = sc.nextInt();
double zc = 2*Math.PI*radius;
System.out.println("圆的周长是:" + zc);
double area = Math.PI * radius * radius;
System.out.println("圆的面积是:" + area);




手写很辛苦的请采纳 参考技术A public static void main(String[] args)
Scanner sc = new Scanner(System.in);
double r = sc.nextDouble();
System.out.println("周长为： " + 6.28*r);
System.out.println("面积为： " + 1.57*r*r);

Java作业 输入圆的半径计算输出圆的周长和面积

 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 }