916980_0_0_30259.c 916980_0_0_30259.c(4) : error C2065: “whilescanfdd” : 未声明的标识符 916980_0_0_30259.c(4) : error C2065: “b” : 未声明的标识符 916980_0_0_30259.c(5) : error C2065: “EOF” : 未声明的标识符 916980_0_0_30259.c(5) : error C2143: 语法错误 : 缺少“;”(在“{”的前面)