View Compilation Error

0_0_18838541_10308.cpp
0_0_18838541_10308.cpp(15) : error C2668: “floor”: 对重载函数的调用不明确
        VC2013\INCLUDE\math.h(1185): 可能是“long double floor(long double) throw()”
        VC2013\INCLUDE\math.h(1069): 或       “float floor(float) throw()”
        VC2013\INCLUDE\math.h(536): 或       “double floor(double)”
        尝试匹配参数列表“(int)”时