View Compilation Error

0_0_2443094_1208.cpp
0_0_2443094_1208.cpp(18) : 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
0_0_2443094_1208.cpp(19) : 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