0_0_38088821_19827.cpp 0_0_38088821_19827.cpp(5) : error C3861: “scanf”: 找不到标识符 0_0_38088821_19827.cpp(8) : error C3861: “scanf”: 找不到标识符 0_0_38088821_19827.cpp(9) : error C3861: “printf”: 找不到标识符