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0_0_16948668_1667.cpp
0_0_16948668_1667.cpp(14) : error C2668: “log10”: 对重载函数的调用不明确
        VC2013\INCLUDE\math.h(1211): 可能是“long double log10(long double) throw()”
        VC2013\INCLUDE\math.h(1095): 或       “float log10(float) throw()”
        VC2013\INCLUDE\math.h(502): 或       “double log10(double)”
        尝试匹配参数列表“(int)”时
0_0_16948668_1667.cpp(18) : error C2059: 语法错误:“<”