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December 6, 2017 04:04
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Create Queue using Linked list
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//QUEUE USING LINKED LIST | |
#include <bits/stdc++.h> | |
#include<conio.h> | |
using namespace std; | |
//Create a NODE | |
struct node | |
{ | |
int data; | |
struct node *next; | |
}; | |
//Create a class | |
class myQueue | |
{ | |
struct node *front,*tail; | |
public: | |
// constructure | |
myQueue() | |
{ | |
front=tail=NULL; | |
} | |
//declaration | |
void Enqueue(int x); // to insert an element | |
void Dequeue(); // to delete an element | |
void Display(); // to show the stack | |
}; | |
//Definition | |
//Enqueue | |
void myQueue::Enqueue(int x) | |
{ | |
int value; | |
struct node *newNode; | |
cout<<"Enter a number to enqueue in queue: "; | |
cin>>value; | |
newNode=new node; | |
newNode->data=value; | |
newNode->next=NULL; | |
if(front==NULL) | |
front=newNode; | |
else | |
tail->next=newNode; | |
tail=newNode; | |
} | |
// Dequeue | |
void myQueue::Dequeue() | |
{ | |
if(front==NULL) | |
{ | |
cout<<"Queue is empty"<<endl; | |
return; | |
} | |
struct node *temp; | |
temp=front; | |
front=front->next; | |
cout<<temp->data<<" removed from the queue "<<endl; | |
delete temp; | |
} | |
// Show Queue | |
void myQueue::Display() | |
{ | |
struct node *ptr1=front; | |
if(front==NULL) | |
{ | |
cout<<"The Queue is empty!!"; | |
return; | |
} | |
cout<<endl; | |
cout<<"The Queue is : "<<endl; | |
cout<<"front->"; | |
while(ptr1!=NULL) | |
{ | |
cout<<ptr1->data<<" ->"; | |
ptr1=ptr1->next; | |
} | |
cout<<"tail"<<endl; | |
} | |
// Main function | |
int main() | |
{ | |
myQueue q; | |
//take care, we can ignore those numbers in function and make it as you want. | |
//if you want to print the same output, ignore value variable fron enqueue method and only use x | |
q.Enqueue(5); //5 | |
q.Enqueue(6); //5 6 | |
q.Enqueue(8); //5 6 8 | |
q.Enqueue(10); //5 6 8 10 | |
q.Display(); //5 6 8 10 | |
q.Dequeue(); //6 8 10 | |
q.Display(); //6 8 10 | |
q.Dequeue(); //8 10 | |
q.Display(); //8 10 | |
q.Enqueue(7); //8 10 7 | |
q.Display(); //8 10 7 | |
return 0; | |
} | |
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