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View Compilation Error

0_0_23371902_28356\Main.java:12: 错误: 无法从静态上下文中引用非静态 变量 cin
    cin=new Scanner(System.in);
    ^
0_0_23371902_28356\Main.java:13: 错误: 无法从静态上下文中引用非静态 变量 cin
while(cin.hasNext())
      ^
0_0_23371902_28356\Main.java:18: 错误: 无法从静态上下文中引用非静态 变量 cin
    a=cin.nextBigInteger();
      ^
0_0_23371902_28356\Main.java:19: 错误: 无法从静态上下文中引用非静态 变量 cin
    b=cin.nextBigInteger();
      ^
0_0_23371902_28356\Main.java:21: 错误: 找不到符号
   a=a.mutipuly(b);
      ^
  符号:   方法 mutipuly(BigInteger)
  位置: 类型为BigInteger的变量 a
5 个错误


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