559782_0_0_26173.c 559782_0_0_26173.c(5) : error C2143: 语法错误 : 缺少“;”(在“类型”的前面) 559782_0_0_26173.c(9) : error C2065: “sum” : 未声明的标识符 559782_0_0_26173.c(12) : error C2065: “m” : 未声明的标识符