C++ :: Increase Sizes Of Queue In A Vector Of Queues And Find Shortest Queue
Feb 20, 2013
I have a paradigm in a loop of queues of a vector,if a condition is true,increase sizes of the queue of that particular queue in the loop of queues, if condition is false, the queuesize is left as such in loop of queues. After this operation i need to search the queue sizes of all queues and enqueue in the shortest queue.
I have a paradigm where a integer before gets enqueued to a queue in a vector, the loop of queues is searched and integer is enqueued to a queue which has minimum size among the queues. the following code shows the operation
next i am trying to extend my paradigm with the condition, that the integers should be enqueued to the shortest queue until the count of the shortest queue is less than or equal to count of any another queues in the loop of queues.
I am trying to implement a Task scheduler where i have n number of tasks. The Idea behind my task scheduler is that in a loop of queues of a vector, task should get enqueued to the shortest queue among the loop of queues, which is done by the following code.
#include <vector> #include <queue> std::vector<std::queue<int> > q int min_index = 0; task t // implemented in the other part of the program
[Code] ....
Next i am trying to extend this paradigm to reduce the overhead time of the scheduler, Instead of searching the shortest queue every time, search after some condition ie. search the shortest queue after 5 tasks gets enqueued to the shortest queue.
i need to do something like this
#include <vector> #include <queue> std::vector<std::queue<int> > q task t // implemented in the other part of the program while(q[min_index].size()!=q[min_index].size()+5) // check whether current min_index queue's size is increased 5 more times if not goto enqueue
There appears to be some kind of error in by removeMin() function. Inserting items seems to work just fine but attempting to remove any items gives me the error "vector subscript out of range".
Here is my SortedPQ class... Below it you will find the quicksort implementation, in case looking at it is necessary.
template <class Type> class SortedPQ { private: int front; int rear; vector<Type> V; public: SortedPQ(void) : front(-1), rear(-1), V(0){}
I'm trying to use a priority queue sorting in reverse order to take a vector or 2d array. The problem is that I want to sort by the vector/array cell value but keep the reference to the vector/array index of the value. I don't know quite howto keep them both related so when I pop. I can find the corresponding cell.
How to build a FiFO queue without using the STL (done that no problem), get it to dequeue (again, done that no problem). However, to get those extra marks, I need to be able to order it using a priority system.
I've tried ordering the NodeDequeue class that I'll show at the bottom of this post, but I just cannot get it to order appropriately. The closest I have got is everything in order but I lose a Node from the memory completely. So, that's no good.
The most logical idea I have thought of right now is to send the largest number to the back of the queue each time it's iterated, eventually, the largest number will end up at the front.
class PriorityQueue : public Queue { public: Node* NodeDequeue(void) { Node* tmp = front; Node* seek = tmp->getPrev();
I have the following code which will find the minimum size queue among a vector of queues and the minimimum size queue will enqueue(push) the int
std::vector<std::queue<int> > q void enqueue(){ int min_index = 1; std::size_t size = q.size(); for( i=2; i<size; i++) //accessing loop of queues if(q[min_index].size() > q[i].size()) min_index = i; // Now q[min_index] is the shortest queue q[min_index].push(int) }
Now my another paradigm is to do the dequeue(pop) operation in another function(shown below), bt i need to access all vector of queues declared in enqueue() function. how can i access the loop of queues given in the enqueue() function?
void dequeue(){ //q.pop operation , access all the queues in the loop of queues } willq[i].pop(int);
Access all the queues in the enqueue function and does the pop operation?
i have a paradigm where a integer before gets enqueued to a queue, the loop of queues in a vector is searched and integer is enqueued to a queue which has minimum size among the queues. the following code shows the operation.
#include <vector> #include <queue> std::vector<std::queue<int> > q int min_index = 0; std::size_t size = q.size(); for( i=0; i<size; i++){ //accessing loop of queues if(q[min_index].size() > q[i].size()) min_index = i; // Now q[min_index] is the shortest queue} q[min_index].push(int)
next i am trying to extend my paradigm with that the condition the integers should be enqueued to the shortest queue until it becomes maximum size among the queues.
do{ q[min_index].push(int) } while(q[min_index].size > queue sizes in the vector loop except this queue )
how to search the loop of queues of vector in the while ()
I'm having a problem with removing an item from a queue. At first in the debugger I got SIGTRAP but I don't get it anymore but the problem still exists. When you try to remove an item from the queue the first nothing happens. Here's the code below compile it and you see what I'm talking about.
Why is this code not marking that the queue is full.. I'm just including my Add function that verifies if they want to add another number to the queue. The isFull function works fine, have used it on other programs.
template <class T> //Template currSize function int Queue<T> :: currSize () { return (rear - front + arraylength) % arraylength; //
[Code].....
The output goes all the way down to 1 spot left, lets the user enter the last element. Then it asks if they want to add another.. At this point, when they hit Y, it lets them add it and it says there are 5 spots left!
I'm trying to implement Prim's Algorithm and for that I need to have a decreaseKey method for a priority queue (to update the key value in a priority queue). Can I implement this in the STL Priority Queue?
This is the algorithm I'm following:
for each vertex u in graph G set key of u to INFINITY set parent of u to NIL set key of source vertex to 0 en-queue to priority queue Q all vertices in graph
I've got a priority queue of items who, from time to time, returns a different comparison result. Any way to re-sort a priority queue who is storing them?
I've been working on a little project and hit a snag. I'm using nodes for a queue and stack class that were created using an existing list node class. I create an object for a student class and I want to enqueue that object.
Write a program to simulate a printer queue (priority queue or heap – Bentley article has code) where 3 printers are “fed” by this queue. Each print job has an unchanging priority and higher priority jobs go first (although once started, a job isn't stopped to let a higher one go). For each unit of time, there is a 26% probability that a job will be added to the queue and all jobs take 8 time units to complete. Print job priorities are between 5 and 100. The queue opens 20 time units prior to the start of printing for adding print “jobs”. A print “day” is 1000 time units. The output from your program is:
1) A list of jobs completed with their priorities for each printer
my code is already finished. im using parallel queues and im having problem in the queue customer name if i dont input space the code is fine but if i input space in the name it skips the bagcode and immediately jump to the number of bags what can i do to include the white spaces in the customer name and push it to the queue?
here's my code
#include <iostream> #include <string> #include <queue> #include<conio.h> using namespace std; int main() { queue<string> customer;
Write an email simulator that processes mail at an average of 40 messages per minute. As messages are received, they are placed in a queue.assume that the messages arrive at an average rate of 30 messages per minute.messages must arrive randomly.
Each minute, you can dequeue up to 40 messages and send them. Assume that 25% of the messages in the queue cannot be sent in any processing cycle.use a random number to determine whether a given message can be sent. If it can't be sent, enqueue it.
Run the simulation for 24 hours, At the end of the simulation, print the statistics that show:
-The total messages processed. -The average arrival rate. -The average number of messages sent per minute. -The average number of messages in queue in a minute. -The number of messages sent on the first attempt, the number sent on the second attempt, and so forth. -The average number of times messages had to be requeued (do not include the messages sent the first time in this average)
Well, actually I've done a part of the coding. But how to continue it. And here is my code :
#include <iostream> using namespace std; #define SIZE 40 class Queue { int queue[SIZE]; int head, tail; public: Queue(); void Enq(int num);
I'm trying to write a code that proves a queue like fifo (first in first out). I have four characters :
p(rint),e(nqueue),d(equeue) and q(uit).
The problem is when I press d a first character must get rid of, but not. When I press d the numbers get double.
Example input: e 2 3 9 8 7 p 2 3 9 8 7 d p 3 9 8 7 d p 9 8 7
#include <stdio.h> void enqueue(int queue[], int newnum, int *tail_p, int maxsize); void deque(int queue[], int *tail_p, int *elem); void printqueue(int queue[],int count);
