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View Compilation Error

0_0_13541123_21585.cpp
0_0_13541123_21585.cpp(3) : error C4430: 缺少类型说明符 - 假定为 int。注意:  C++ 不支持默认 int
0_0_13541123_21585.cpp(3) : error C2668: “sqrt”: 对重载函数的调用不明确
        VC2013\INCLUDE\math.h(1251): 可能是“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)”
        尝试匹配参数列表“(int)”时


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