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0_0_39118004_13394.cpp
0_0_39118004_13394.cpp(45) : error C2065: “stack”: 未声明的标识符
0_0_39118004_13394.cpp(45) : error C2275: “Tree”: 将此类型用作表达式非法
        0_0_39118004_13394.cpp(8) : 参见“Tree”的声明
0_0_39118004_13394.cpp(45) : error C2065: “s”: 未声明的标识符
0_0_39118004_13394.cpp(46) : error C2065: “s”: 未声明的标识符
0_0_39118004_13394.cpp(46) : error C2228: “.push”的左边必须有类/结构/联合
        类型是“unknown-type”
0_0_39118004_13394.cpp(47) : error C2065: “s”: 未声明的标识符
0_0_39118004_13394.cpp(47) : error C2228: “.push”的左边必须有类/结构/联合
        类型是“unknown-type”
0_0_39118004_13394.cpp(48) : error C2065: “s”: 未声明的标识符
0_0_39118004_13394.cpp(48) : error C2228: “.push”的左边必须有类/结构/联合
        类型是“unknown-type”
0_0_39118004_13394.cpp(51) : error C2065: “s”: 未声明的标识符
0_0_39118004_13394.cpp(51) : error C2228: “.top”的左边必须有类/结构/联合
        类型是“unknown-type”
0_0_39118004_13394.cpp(51) : fatal error C1903: 无法从以前的错误中恢复；正在停止编译