0_0_15190945_9123.cpp 0_0_15190945_9123.cpp(2) : error C2059: 语法错误:“;” 0_0_15190945_9123.cpp(7) : error C2065: “cin”: 未声明的标识符 0_0_15190945_9123.cpp(7) : fatal error C1903: 无法从以前的错误中恢复;正在停止编译