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View Compilation Error

0_0_37969514_311\Main.java:1: 错误: 类private01是公共的, 应在名为 private01.java 的文件中声明
public class private01 {
       ^
0_0_37969514_311\Main.java:4: 错误: 找不到符号
        Scanner sc = new Scanner(System.in);
        ^
  符号:   类 Scanner
  位置: 类 private01
0_0_37969514_311\Main.java:4: 错误: 找不到符号
        Scanner sc = new Scanner(System.in);
                         ^
  符号:   类 Scanner
  位置: 类 private01
0_0_37969514_311\Main.java:8: 错误: 找不到符号
            BigDecimal num1 = sc.nextBigDecimal();
            ^
  符号:   类 BigDecimal
  位置: 类 private01
0_0_37969514_311\Main.java:9: 错误: 找不到符号
            BigDecimal num2 = sc.nextBigDecimal();
            ^
  符号:   类 BigDecimal
  位置: 类 private01
5 个错误


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