513162_0_0_20778.c 513162_0_0_20778.c(9) : error C2143: 语法错误 : 缺少“;”(在“类型”的前面) 513162_0_0_20778.c(12) : error C2065: “sum2” : 未声明的标识符 513162_0_0_20778.c(14) : error C2065: “sum1” : 未声明的标识符