C Program of Circular Queue

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void main()
{
    int queue[10],front=1,rear=1,ch,val,i;
clrscr();
do{
  printf("i.insert 2.delete 3.display 4.exit");
  scanf("%d",& ch);
  if(ch == 1)
   {
 printf("Enter the value");
 scanf("%d", &val);
 if(front == [rear+1]+6)
  printf("queue is full");
 else
  if(front == 1 && rear == 1)
   {
 front =0;
 rear =0;
 queue[rear] = val;
}
  else if(rear<5)
   {
 rear rear+1;
 queue[rear] = val;
}
  else if(rear == 5 && front != 0)
   {
 rear = 0;
 queue[rear] =val;
}
if(ch == 2)
 {
   if(front<=rear)
 printf("%d",queue[front++]);
else if(front < 5)
 printf("%d",queue[front++]);
else
 if(front == 5 && rear != 0)
  front = 0;
 else
  printf("queue is empty");
  }
 if(ch == 3)
  {
    if(front <= rear)
 {
   for(i=front;i<=rear;i++)
printf("%d",queue[i]);
for(i=front;i<5;i++)
printf("%d",queue[i]);
 }
}
  if(ch == 4)
   {
 exit(0);
}
 }while(1);
  getch();
 
}