View Compilation Error

0_0_38243053_19853.cpp
0_0_38243053_19853.cpp(6) : error C2065: “vector”: 未声明的标识符
0_0_38243053_19853.cpp(6) : error C2062: 意外的类型“int” 
0_0_38243053_19853.cpp(11) : error C2065: “vec”: 未声明的标识符
0_0_38243053_19853.cpp(11) : error C2228: “.push_back”的左边必须有类/结构/联合
        类型是“unknown-type”
0_0_38243053_19853.cpp(15) : error C2065: “vec”: 未声明的标识符