0_0_39649125_26459.cpp 0_0_39649125_26459.cpp(10) : error C2065: “cin”: 未声明的标识符 0_0_39649125_26459.cpp(13) : error C2065: “cin”: 未声明的标识符 0_0_39649125_26459.cpp(17) : error C2065: “cout”: 未声明的标识符