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View Compilation Error

0_0_39671238_21702\Main.java:2: 错误: 类Demo40_1是公共的, 应在名为 Demo40_1.java 的文件中声明
public class Demo40_1 {public static void main(String[] args) {Scanner sc=new Scanner(System.in);
       ^
0_0_39671238_21702\Main.java:3: 错误: 找不到符号
intm=sc.nextInt();
^
  符号:   变量 intm
  位置: 类 Demo40_1
0_0_39671238_21702\Main.java:4: 错误: 找不到符号
                                                               System.out.println(new test40_1().fum(m));}
                                                                                                     ^
  符号:   变量 m
  位置: 类 Demo40_1
0_0_39671238_21702\Main.java:4: 错误: 找不到符号
                                                               System.out.println(new test40_1().fum(m));}
                                                                                      ^
  符号:   类 test40_1
  位置: 类 Demo40_1
4 个错误


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