View Compilation Error

992177_0_0_12033.cpp
992177_0_0_12033.cpp(5) : error C2668: “acos” : 对重载函数的调用不明确
        VC\include\math.h(586): 可能是“long double acos(long double)”
        VC\include\math.h(538): 或       “float acos(float)”
        VC\include\math.h(183): 或       “double acos(double)”
        试图匹配参数列表“(long)”时
992177_0_0_12033.cpp(13) : error C2668: “log” : 对重载函数的调用不明确
        VC\include\math.h(612): 可能是“long double log(long double)”
        VC\include\math.h(564): 或       “float log(float)”
        VC\include\math.h(193): 或       “double log(double)”
        试图匹配参数列表“(long)”时