(8) : error C2015: 常量中的字符太多
(8) : error C2668: “std::basic_string<_Elem,_Traits,_Ax>::find”: 对重载函数的调用不明确
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Ax=std::allocator<char>
        ]
        VC8\include\xstring(1716): 可能是“unsigned int std::basic_string<_Elem,_Traits,_Ax>::find(_Elem,unsigned int) const”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Ax=std::allocator<char>
        ]
        VC8\include\xstring(1711): 或“unsigned int std::basic_string<_Elem,_Traits,_Ax>::find(const _Elem *,unsigned int) const”
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Ax=std::allocator<char>
        ]
        试图匹配参数列表“(int)”时