684732_0_0_22214.c 684732_0_0_22214.c(3) : error C2065: “inta” : 未声明的标识符 684732_0_0_22214.c(3) : error C2065: “b” : 未声明的标识符 684732_0_0_22214.c(3) : error C2065: “c” : 未声明的标识符 684732_0_0_22214.c(4) : error C2065: “a” : 未声明的标识符