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View Compilation Error

0_0_23217964_5799.cpp
0_0_23217964_5799.cpp(89) : 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
0_0_23217964_5799.cpp(146) : error C2086: “int a[55]”: 重定义
        0_0_23217964_5799.cpp(11) : 参见“a”的声明
0_0_23217964_5799.cpp(152) : error C2084: 函数“int main(void)”已有主体
        0_0_23217964_5799.cpp(14) : 参见“main”的前一个定义
0_0_23217964_5799.cpp(224) : 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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