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0_0_15477038_23651.cpp
0_0_15477038_23651.cpp(15) : error C2668: “fabs”: 对重载函数的调用不明确
        VC2013\INCLUDE\math.h(1181): 可能是“long double fabs(long double) throw()”
        VC2013\INCLUDE\math.h(1065): 或       “float fabs(float) throw()”
        VC2013\INCLUDE\math.h(491): 或       “double fabs(double)”
        尝试匹配参数列表“(int)”时