c++ - Classes and Queue's -

i trying figure out how work queues , classes.

how can insert information class queue?

i created queue queue<processes> printerdevices

how go insert stuff on queue class or reading it?

class processes {     public:         void setpid (int a)         {             pid = a;         }         int retrievepid()         {             return pid;         }         void setfilename (string input)         {             filename = input;         }         string retrievefilename()         {             return filename;         }         void setmemstart (int a)         {             memstart = a;         }         int retrievememstart()         {             return memstart;         }         void setrw (char a)         {             rw = a;         }         int retrieverw()         {             return rw;         }         void setfilelength (string input)         {             filelength = input;         }         string retrievefilelength()         {             return filelength;         }     private:         int pid;         string filename;         int memstart;         char rw;         string filelength; }; 

queue<processes> printerdevices; processess obj; //populate object through setter methods 

to add object queue printerdevices

`printerdevices.push(obj);` 

similarly can create more object.. traverse...

while(!printerdevices.empty()) {       processes obj = printerdevices.front();          //add code use obj;       printerdevices.pop();//remove object queue used above }