Classes and Queue's

Question

I am trying to figure out how to work with Queues and Classes.

How can i insert information into this class with a queue?

I created the queue queue<Processes> PrinterDevices

How do i go about insert stuff on this queue into a class or reading from 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;
};

Basically i want to insert the variables PID/Filename/MemStart/RW/File length into a queue, and print them. How do i do this with a class? — tyrone 251, Mar 10 '14 at 05:28
Iterating over a queue is not possible because it provides a minimal interface. See the below link for the complete description. "How to iterate over a priority_queue?" So I would prescribe you to provide stl:: deques which will help your work. — Santosh Sahu, Mar 10 '14 at 05:50

HadeS · Accepted Answer · 2014-03-10T06:04:26.017

1

queue<Processes> PrinterDevices;
Processess obj;
//Populate object through setter methods

To add this object to queue PrinterDevices

`PrinterDevices.push(obj);`

Similarly you can create more object.. To traverse...

while(!PrinterDevices.empty())
{
      Processes obj = PrinterDevices.front();
         //Add code to use obj;
      PrinterDevices.pop();//Remove the object from queue which is already used above
}

edited Mar 10 '14 at 06:04

answered Mar 10 '14 at 05:42

HadeS

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I create a copy of my queue when i print it. But i need to use queue for my assignment. – tyrone 251 Mar 10 '14 at 05:51
So if you don't want to retain the objects you are storing 'front()' and `pop()` can be used to traverse the list...Look for the changes once I have edited the code above – HadeS Mar 10 '14 at 05:57
got it. Now how do i add to certain things such as setpid or or setfilename in my class? – tyrone 251 Mar 10 '14 at 06:16
`obj.setFilename ("filename.txt");` and call other setter methods...finally call `PrinterDevices.push(obj)` to add object to queue... – HadeS Mar 10 '14 at 06:21
HadeS How would i print that object after i added it into the queue? – tyrone 251 Mar 10 '14 at 07:19

Classes and Queue's

1 Answers1