0_0_17821633_12009.c 0_0_17821633_12009.c(14) : error C2065: “t”: 未声明的标识符 0_0_17821633_12009.c(15) : error C2065: “t”: 未声明的标识符 0_0_17821633_12009.c(16) : error C2065: “t”: 未声明的标识符