View Compilation Error

0_0_39663072_29352\Main.java:1: 错误: 类Demo40_1是公共的, 应在名为 Demo40_1.java 的文件中声明
import java.util.Scanner;public class Demo40_1 {public static void main(String[] args) {Scanner sc=new Scanner(System.in);int m=sc.nextInt();System.out.println(new test40_1().fum(m));}int fum(int m) {if(m==1||m==0) {return 1;}return fum(m-1)+fum(m-2);}}
                                ^
0_0_39663072_29352\Main.java:1: 错误: 找不到符号
import java.util.Scanner;public class Demo40_1 {public static void main(String[] args) {Scanner sc=new Scanner(System.in);int m=sc.nextInt();System.out.println(new test40_1().fum(m));}int fum(int m) {if(m==1||m==0) {return 1;}return fum(m-1)+fum(m-2);}}
                                                                                                                                                                    ^
  符号:   类 test40_1
  位置: 类 Demo40_1
2 个错误