arraywithqueue, C (vc)

arraywithqueue

//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64
#include<stdio.h>
#include<conio.h>
#define size 5
int queue[size],choice,front=-1,rear=-1,value;
void enqueue();
void dequeue();
void display();
void main()
{
	printf("\n press 1 for enqueue \n press 2 for dequeue \n press 3 display \n press 4 for exit");
	printf("\n enter your choice");
	scanf("%d",&choice);
	do
	{
		switch(choice)
		{
			case 1: enqueue();
			break;
			case 2: dequeue();
			break;
			case 3: display();
			break;
			default:
			printf("wrong choice");	
		}
	} while(1);
	getch();
}
void enqueue()
{
	if(rear=size-1)
	{
		printf("Queue is full");
	}
	else
	{
		rear=rear+1;
		printf("\n Enter an value");
		scanf("%d",&value);
		queue[rear]=value;
	}
}
void dequeue()
{
	if(front==-1 && rear==-1)
	{
		printf("queue is empty");
	}
	else
	{
		front=front+1;
		printf("%d",queue[front]);
		if(front==rear)
		{
			front=-1;rear=-1;
		}
	}
}
void display()
{
	int i;
	for(i=front;i<=rear;i++)
	{
		printf("\n %d",queue[i]);
	}
}


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