0_0_38380002_5419.cpp 0_0_38380002_5419.cpp(4) : error C3861: “scanf”: 找不到标识符 0_0_38380002_5419.cpp(8) : error C3861: “scanf”: 找不到标识符 0_0_38380002_5419.cpp(15) : error C3861: “printf”: 找不到标识符