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Title Program for Circular Queue Implementation using Arrays
Author Nunna Santhosh Kumar
Author Email santu.nunna [at] gmail.com
Description
Category C++ » Data Structures
Hits 68987
Code Select and Copy the Code
Code : /* Circular Queues */ #include<iostream.h> #include<conio.h> const int MAX = 5; class cqueue { int a[MAX],front,rear; public : cqueue() { front=rear=-1; } void insert(int ); int deletion(); void display(); }; void cqueue :: insert(int val) { if((front==0 && rear==MAX-1) || (rear+1==front)) cout<<" Circular Queue is Full "; else { if(rear==MAX-1) rear=0; else rear++; a[rear]=val; } if(front==-1) front=0; } int cqueue :: deletion() { int k; if(front==-1) cout<<"Circular Queue is Empty "; else { k=a[front]; if(front==rear) front=rear=-1; else { if(front==MAX-1) front=0; else front++; } } return k; } void cqueue :: display() { int i; if(front==-1) cout<<"Circular Queue is Empty "; else { if(rear < front) { for(i=front;i<=MAX-1;i++) cout<<a[i]<<" "; for(i=0;i<=rear;i++) cout<<a[i]<<" "; } else { for(i=front;i<=rear;i++) cout<<a[i]<<" "; cout<<endl; } } } void main() { cqueue c1; int ch,val; char op; do { clrscr(); cout<<"-----------Menu------------- "; cout<<"1.Insertion 2.Deletion 3.Display 4.Exit "; cout<<"Enter Your Choice <1..4> ?"; cin>>ch; switch(ch) { case 1 : cout<<"Enter Element to Insert ?"; cin>>val; c1.insert(val); break; case 2 : val=c1.deletion(); cout<<"Deleted Element :"<<val<<endl; break; case 3 : c1.display(); break; } cout<<"Do you want to continue<Y/N> ?"; cin>>op; }while(op=='Y' || op=='y'); getch(); }

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