0_0_17647406_23388.cpp 0_0_17647406_23388.cpp(17) : error C2065: “i”: 未声明的标识符 0_0_17647406_23388.cpp(18) : error C2065: “i”: 未声明的标识符 0_0_17647406_23388.cpp(23) : error C2065: “i”: 未声明的标识符