0_0_37855175_19303.cpp 0_0_37855175_19303.cpp(9) : error C2065: “cin”: 未声明的标识符 0_0_37855175_19303.cpp(14) : error C2065: “cin”: 未声明的标识符 0_0_37855175_19303.cpp(30) : error C3861: “max”: 找不到标识符