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0_0_8764421_22762.cpp
0_0_8764421_22762.cpp(262) : error C2668: “fabs” : 对重载函数的调用不明确
        VC\include\math.h(602): 可能是“long double fabs(long double)”
        VC\include\math.h(554): 或       “float fabs(float)”
        VC\include\math.h(190): 或       “double fabs(double)”
        试图匹配参数列表“(const std::allocator<_Ty>::value_type)”时
        with
        [
            _Ty=real
        ]