0_0_39349429_26640.cpp 0_0_39349429_26640.cpp(1) : error C2065: “maxn”: 未声明的标识符 0_0_39349429_26640.cpp(2) : error C2065: “maxn”: 未声明的标识符 0_0_39349429_26640.cpp(3) : error C2065: “maxn”: 未声明的标识符