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Title Program for Circular Queue implementation through Array.
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Category C » Data Structures
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#include <stdio.h> #include<ctype.h> # define MAXSIZE 200 int cq[MAXSIZE]; int front,rear; void main() { void add(int,int [],int,int,int); int del(int [],int ,int ,int ); int will=1,i,num; front = 1; rear = 1; clrscr(); printf(" Program for Circular Queue demonstration through array "); while(will ==1) { printf(" MAIN MENU: 1.Add element to Circular Queue 2.Delete element from the Circular Queue "); scanf("%d",&will); switch(will) { case 1: printf(" Enter the data... "); scanf("%d",&num); add(num,cq,MAXSIZE,front,rear); break; case 2: i=del(cq,MAXSIZE,front,rear); printf(" Value returned from delete function is %d ",i); break; default: printf(" Invalid Choice . "); } printf(" Do you want to do more operations on Circular Queue ( 1 for yes, any other key to exit) "); scanf("%d" , &will); } //end of outer while } //end of main void add(int item,int q[],int MAX,int front,int rear) { rear++; rear= (rear%MAX); if(front ==rear) { printf(" CIRCULAR QUEUE FULL "); return; } else { cq[rear]=item; printf(" Rear = %d Front = %d ",rear,front); } } int del(int q[],int MAX,int front,int rear) { int a; if(front == rear) { printf(" CIRCULAR STACK EMPTY "); return (0); } else { front++; front = front%MAX; a=cq[front]; return(a); printf(" Rear = %d Front = %d ",rear,front); } }

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