0_0_39031171_20749.cpp 0_0_39031171_20749.cpp(18) : error C2872: “count”: 不明确的符号 可能是“0_0_39031171_20749.cpp(10) : int count” 或 “VC2013\INCLUDE\xutility(3086) : iterator_traits<_Iter>::difference_type std::count(_InIt,_InIt,const _Ty &)”