0_0_23484925_3569.cpp 0_0_23484925_3569.cpp(5) : error C2065: “cin”: 未声明的标识符 0_0_23484925_3569.cpp(10) : error C2065: “cin”: 未声明的标识符 0_0_23484925_3569.cpp(11) : error C3861: “printf”: 找不到标识符 0_0_23484925_3569.cpp(12) : error C3861: “printf”: 找不到标识符