863243_0_0_16463.c 863243_0_0_16463.c(1) : error C2065: “inta” : 未声明的标识符 863243_0_0_16463.c(1) : error C2065: “b” : 未声明的标识符 863243_0_0_16463.c(1) : error C2065: “a” : 未声明的标识符