第一次实训作业 

 1 package ddd;
 2 
 3 import java.util.Scanner;
 4 
 5 public class aaa {
 6     public static void main(String[] args){
 7         double m;
 8         Scanner R=new Scanner(System.in);
 9         int r;
10         r=R.nextInt();
11         m=r*r*3.14;
12         System.out.println("面积为："+m);
13         
14     }
15 
16 }
 1 package ddd;
 2 
 3 public class ccc {
 4     public static void main(String[] args){
 5         int a=5;
 6         if(a%2==1){
 7         System.out.println("奇数");
 8         }else{
 9             System.out.println("偶数");        }
10     }
11 
12 }
package ddd;

import java.util.Scanner;
public class fff {
    public static void main(String[] args){
        System.out.println("请输入你要加密的数字：");
        Scanner in = new Scanner(System.in);
        int s;
        s = in.nextInt();
        double S;
        S=(s*10+5) / 2 + 3.14159;
        int x=(int)S;
        System.out.println("密码为："+x);
         
}
 }

 

posted @ 2019-04-13 15:28  就很棒！  阅读(115)  评论(0)    收藏  举报