Untitled

#include<stdio.h>
#include<stdlib.h>
struct student
{
	int rno;
	struct student*next;
};

int main()
{
	struct student*head,*temp,*newnode;
	int choice;
	head=NULL;

	do
	{
		printf("\nMENU");
		printf("\n 1.INSERT BEGINNING\n2.DELETE BEGINNING\n3.DISPLAY\n4.EXIT");
		printf("\nEnter your Choice");
		scanf("%d",&choice);
		switch(choice)
		{
		case 1:
		newnode=(struct student*)malloc(sizeof(struct student));
		printf("Enter Roll No:");
		scanf("%d",&newnode->rno);

		if(head==NULL)
		{
			head=newnode;
			newnode->next=NULL;
		}
		else
		{
			newnode->next=head;
			head=newnode;
		}
		printf("%d is inserted at beginning\n",newnode->rno);
		break;
	case 2:
		if(head==NULL)
		printf("Linked List is Empty\n");
		else
		{
		temp=head;
		head=head->next;
		printf("%d is deleted at beginning\n",temp->rno);
		free(temp);
	}
	break;
	
case 3:
	if(head==NULL)
	printf("Linked List is Empty\n");
	else
	{
		temp=head;
		printf("Contents of linked list\n");
		while(temp!=NULL)
		{
			printf("\t%d",temp->rno);
			temp=temp->next;				
		}
	}
	break;
case 4:
	printf("Exiting the linked lidt");
	break;
	default:printf("Invalid Option\n");
	}
}
while(choice!=4);
return 0;
}