0_0_19245432_9554.cpp 0_0_19245432_9554.cpp(17) : error C2065: “i”: 未声明的标识符 0_0_19245432_9554.cpp(19) : error C2065: “i”: 未声明的标识符 0_0_19245432_9554.cpp(20) : error C2065: “i”: 未声明的标识符