0_0_38740626_29319.c 0_0_38740626_29319.c(13) : error C2065: “判断sum的值,取后两位”: 未声明的标识符 0_0_38740626_29319.c(13) : error C2146: 语法错误: 缺少“;”(在标识符“sum”的前面)