View Compilation Error

0_0_15201554_26453.cpp
0_0_15201554_26453.cpp(4) : error C4430: 缺少类型说明符 - 假定为 int。注意:  C++ 不支持默认 int
0_0_15201554_26453.cpp(7) : 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“(float, double)”时