0_0_14835411_26500.c 0_0_14835411_26500.c(9) : error C2065: “sum1”: 未声明的标识符 0_0_14835411_26500.c(10) : error C2065: “sum2”: 未声明的标识符 0_0_14835411_26500.c(11) : error C2065: “sum1”: 未声明的标识符 0_0_14835411_26500.c(11) : error C2065: “sum2”: 未声明的标识符