645424_0_0_587.cpp 645424_0_0_587.cpp(14) : 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“(int)”时