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View Compilation Error

977408_0_0_7309.cpp
977408_0_0_7309.cpp(2) : error C2871: “std” : 具有该名称的命名空间不存在
977408_0_0_7309.cpp(6) : error C2065: “cin” : 未声明的标识符
977408_0_0_7309.cpp(6) : fatal error C1903: 无法从以前的错误中恢复;正在停止编译


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