Linear Queue Program in C-Language

In this C program we will perform operations over Linear Queue(i.e: Data insert Operation, Data remove Operation and display Operation). The Choice(i.e: data insert,remove or display) will be made by the user and The Number will be taken from the user(i.e: For Data insert Operation).

input:

The Choice(i.e Data insert, remove or display) & The Number (integers) (i.e. for Data insert Operations) (15,10,128 etc.)

output:

The Operations will be excecuted as choosen by the user.

CODE---->

#include<stdio.h>
#include<stdlib.h>
#define MAXSIZE 10
int Q[MAXSIZE],front=-1,rear=-1;
void qinsert(int x)
{
 if(rear==MAXSIZE-1)
  printf("\n Queue is Full.");
 else if(front==-1)
 {
  front=0;
  rear=0;
  Q[front]=x; 
 }
 else
 {
  rear++;
  Q[rear]=x;
 }
}
void qdelete()
{
 if(front==-1)
  printf("\n Queue is Empty.");
 else if(front==rear)
 {
  printf("\n %d is removed from Queue.",Q[front]);
  front=-1;
  rear=-1;
 }
 else
 {
  printf("\n %d is deleted from Queue.",Q[front]);
  front++;
 }
}
void display()
{
 int i;
 printf("\n The Queue elements are...\n");
 if(front==-1)
  printf("\n No elements in Queue.");
 else
 {
  for(i=front;i<=rear;i++)
   printf(" %d ",Q[i]);
 }
}
int main()
{
 int choice,x;
 while(1)
 {
  printf("\n 1.Data insert\n 2.Data Delete\n 3.Data Display\n 4.Exit");
  printf("\n Please, Enter your choice : ");
  scanf("%d",&choice);
  switch(choice)
  {
   case 1: printf("\n Please, Enter the element : ");
     scanf("%d",&x);
     qinsert(x);
     break;
   case 2: qdelete();
     break;
   case 3: display();
     break;
   case 4: exit(0);
   default : printf("\n wrong Choice.");
  }
 }
}

Don't just read, write it, run it.....

RESULT: