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View Compilation Error

644005_0_0_12281.cpp
644005_0_0_12281.cpp(5) : error C2065: “cin” : 未声明的标识符
644005_0_0_12281.cpp(5) : error C2065: “cout” : 未声明的标识符
644005_0_0_12281.cpp(5) : error C2065: “endl” : 未声明的标识符


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