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View Compilation Error

0_0_17217676_23202\Main.java:15: 错误: 找不到符号
            n = cin.nextInt();
            ^
  符号:   变量 n
  位置: 类 Main
0_0_17217676_23202\Main.java:16: 错误: 找不到符号
            if(n != 0) {
               ^
  符号:   变量 n
  位置: 类 Main
0_0_17217676_23202\Main.java:17: 错误: 找不到符号
                System.out.println(a[n].toString());
                                     ^
  符号:   变量 n
  位置: 类 Main
3 个错误


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