0_0_30301098_12890.cpp 0_0_30301098_12890.cpp(2) : error C2059: 语法错误:“;” 0_0_30301098_12890.cpp(6) : error C2065: “cin”: 未声明的标识符 0_0_30301098_12890.cpp(6) : fatal error C1903: 无法从以前的错误中恢复;正在停止编译