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0_0_28559654_23264.cpp
0_0_28559654_23264.cpp(6) : error C2065: “j”: 未声明的标识符
0_0_28559654_23264.cpp(8) : 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_28559654_23264.cpp(22) : error C2143: 语法错误 : 缺少“;”(在“}”的前面)