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2_28141_2115029_6599.cpp 2_28141_2115029_6599.cpp(9) : error C2039: “get_length”: 不是“std::basic_string<char,std::char_traits<char>,std::allocator<char>>”的成员
2_28141_2115029_6599.cpp 2_28141_2115029_6599.cpp(9) : error C2039: “get_length”: 不是“std::basic_string<char,std::char_traits<char>,std::allocator<char>>”的成员