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View Compilation Error

0_0_34290349_476\Main.java:5: 错误: 找不到符号
        while(kb.hasNextdouble()){
                ^
  符号:   方法 hasNextdouble()
  位置: 类型为Scanner的变量 kb
0_0_34290349_476\Main.java:6: 错误: 找不到符号
            double n=kb.hasNextdouble();
                       ^
  符号:   方法 hasNextdouble()
  位置: 类型为Scanner的变量 kb
0_0_34290349_476\Main.java:8: 错误: 找不到符号
        System.out.printf("%.2f",Math.abs(n));
                                          ^
  符号:   变量 n
  位置: 类 Main
3 个错误


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