0_0_20734279_26230.cpp 0_0_20734279_26230.cpp(48) : error C2065: “¤t”: 未声明的标识符 0_0_20734279_26230.cpp(48) : error C2227: “->count”的左边必须指向类/结构/联合/泛型类型 类型是“unknown-type”