View Compilation Error

0_0_15617067_14981.cpp
0_0_15617067_14981.cpp(28) : error C3861: “sqr”:  找不到标识符
0_0_15617067_14981.cpp(34) : error C2563: 在形参表中不匹配
0_0_15617067_14981.cpp(34) : error C2568: “=”: 无法解析函数重载
        VC2013\INCLUDE\xtgmath.h(110): 可能是“::std::enable_if<std::is_integral<_Ty>::value,double>::type sqrt(_Ty)”
        VC2013\INCLUDE\math.h(1251): 或       “long double sqrt(long double) throw()”
        VC2013\INCLUDE\math.h(1135): 或       “float sqrt(float) throw()”
        VC2013\INCLUDE\math.h(521): 或       “double sqrt(double)”
        VC2013\INCLUDE\math.h(521): 或       “double sqrt(double)”
        VC2013\INCLUDE\math.h(1135): 或       “float sqrt(float) throw()”
        VC2013\INCLUDE\math.h(1251): 或       “long double sqrt(long double) throw()”
        VC2013\INCLUDE\xtgmath.h(110): 或       “::std::enable_if<std::is_integral<_Ty>::value,double>::type sqrt(_Ty)”
0_0_15617067_14981.cpp(34) : fatal error C1075: 与左侧的 大括号“{”(位于“0_0_15617067_14981.cpp(22)”)匹配之前遇到文件结束