0_0_37482347_12032.c 0_0_37482347_12032.c(13) : error C2065: “str”: 未声明的标识符 0_0_37482347_12032.c(15) : error C2065: “len”: 未声明的标识符 0_0_37482347_12032.c(22) : error C2065: “str”: 未声明的标识符