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0_0_39804919_24653.cpp
0_0_39804919_24653.cpp(9) : error C2666: “pow”: 6 个重载有相似的转换
        VC2013\INCLUDE\math.h(1233): 可能是“long double pow(long double,int) throw()”
        VC2013\INCLUDE\math.h(1231): 或       “long double pow(long double,long double) throw()”
        VC2013\INCLUDE\math.h(1117): 或       “float pow(float,int) throw()”
        VC2013\INCLUDE\math.h(1115): 或       “float pow(float,float) throw()”
        VC2013\INCLUDE\math.h(1027): 或       “double pow(double,int) throw()”
        VC2013\INCLUDE\math.h(512): 或       “double pow(double,double)”
        尝试匹配参数列表“(double, float)”时