Queue using array

#include <stdio.h>
int main()
{
	int A[10],ele,i,F=-1,R=F,ch;
	do
	{
		printf("Enter your choice\n");
		printf("Press 1 for insertion\nPress 2 for deletion\nPress 3 for display\nPress 4 gor quit\n");
		scanf("%d",&ch);
		if(ch==1)  //insertion
		{
			if(R==9)
			{
				printf("Insertion is not possible\n");
			}
			else
			{
				if(F==-1 && R==-1)
				{
					F=0;
					R=0;
				    printf("Enter the element\n");
				    scanf("%d",&ele);
				    A[R]=ele;
				}
				else
				{
					R++;
					printf("Enter the element\n");
				    scanf("%d",&ele);
				    A[R]=ele;
				}
			}
		}
		else if(ch==2)  //deletion
		{
			if(F>R)
			{
				printf("Deletion is not possible\n");
			}
			else
			{
				printf("%d is deleted\n",A[F]);
				F++;
			}
		}
		else if(ch==3)  //display
		{
			if(F>R)
			{
				printf("No element in Queue\n");
			}
			else
			{
				for(i=F;i<=R;i++)
				{
					printf("%d\t",A[i]);
				}
				printf("\n");
			}
		}
		else if(ch==4)  //quit
		{
			exit(0);
		}
		else
		{
			printf("Wrong choice\n");
		}
	}while(ch!=4);
	return 0;
}