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View Compilation Error

0_0_34290409_23759\Main.java:6: 错误: 找不到符号
        double n=kb.NextDouble();
                   ^
  符号:   方法 NextDouble()
  位置: 类型为Scanner的变量 kb
0_0_34290409_23759\Main.java:8: 错误: 找不到符号
        System.out.printf("%.2f\r\n",Math.abs(n));
                                              ^
  符号:   变量 n
  位置: 类 Main
2 个错误


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