0_0_38596063_19764.cpp 0_0_38596063_19764.cpp(6) : error C2065: “ance”: 未声明的标识符 0_0_38596063_19764.cpp(8) : error C2065: “distance”: 未声明的标识符 0_0_38596063_19764.cpp(9) : error C2065: “distance”: 未声明的标识符