0_0_34058573_19494.cpp
0_0_34058573_19494.cpp(36) : error C2065: “cin”: 未声明的标识符
0_0_34058573_19494.cpp(43) : error C2065: “cin”: 未声明的标识符
0_0_34058573_19494.cpp(57) : error C2065: “cout”: 未声明的标识符
0_0_34058573_19494.cpp(57) : error C2065: “endl”: 未声明的标识符
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