0_0_12893900_28434.c 0_0_12893900_28434.c(6) : error C2059: 语法错误 : “}” 0_0_12893900_28434.c(9) : error C2065: “sum” : 未声明的标识符 0_0_12893900_28434.c(10) : error C2065: “i” : 未声明的标识符