0_0_36268374_14894.c 0_0_36268374_14894.c(4) : error C2065: ““”: 未声明的标识符 0_0_36268374_14894.c(4) : error C2065: “f”: 未声明的标识符 0_0_36268374_14894.c(4) : error C2065: “f””: 未声明的标识符