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View Compilation Error

559036_0_0_15396.cpp
559036_0_0_15396.cpp(7) : error C2065: “cin” : 未声明的标识符
559036_0_0_15396.cpp(13) : error C2668: “sqrt” : 对重载函数的调用不明确
        VC\include\math.h(626): 可能是“long double sqrt(long double)”
        VC\include\math.h(578): 或       “float sqrt(float)”
        VC\include\math.h(200): 或       “double sqrt(double)”
        试图匹配参数列表“(int)”时
559036_0_0_15396.cpp(23) : error C2065: “cout” : 未声明的标识符
559036_0_0_15396.cpp(23) : error C2065: “endl” : 未声明的标识符
559036_0_0_15396.cpp(27) : error C3861: “cout”: 即使使用参数相关的查找,也未找到标识符
559036_0_0_15396.cpp(27) : error C3861: “endl”: 即使使用参数相关的查找,也未找到标识符
559036_0_0_15396.cpp(29) : error C3861: “cin”: 即使使用参数相关的查找,也未找到标识符


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