四维容器在.h文件内如何声明?//上面代码写在.cpp文件内可以编译过

四维容器在.h文件内怎么声明?//下面代码写在.cpp文件内可以编译过.

C/C++ code

        int Fourth;//=2    int Third;//=2    int Second;//=2    int Firth;//=2    vector<vector<vector<vector<CString>         > > > vec4(Fourth,vector<vector<vector<CString>             > >(Third,vector<vector<CString>                 >(Second,vector<CString>(Firth))));