ll.c

Please read your package and describe

#include<stdio.h>
#include<conio.h>
#include<alloc.h>
#define null 0

struct list
{
int info;
struct list *link;
};
void main()
{
	int i,num,check;
	struct list *l,*k,*x,*z,*m,*temp;
	clrscr();
	l=(struct list*)malloc(sizeof(struct list));
	k=l;
	z=l;
	do
	{
	printf("\n Choose your option");
	printf("\n 1- Create a linked list");
	printf("\n 2- Display");
	printf("\n 3- Insert at the end");
	printf("\n 4- Insert in between");
	printf("\n 5- Exit\n");
	scanf("%d",&i);
	switch(i)
	{
	case 1:
			printf("\nEnter the data");
			printf("\n Type -1 to exit");
			do
			{
			x=k;
			scanf("%d",&x->info);
			k=(struct list*)malloc(sizeof(struct list));
			x->link=k;
			}while(x->info!=-1);
			x->link=NULL;
			break;

	case 2:
			l=z;
			printf("\n The numbers entered are: ");
			do
			{
			printf("\n%d\n", l->info);
			l=l->link;
			}while(l!=NULL);
			break;
	case 3:
			printf("\n Enter the number you want to insert");
			scanf("%d",&num);
			k=z;
			while(k->info!=-1)
			{
			k=k->link;
			}
			x=k;
			k->info=num;
			k=(struct list*)malloc(sizeof(struct list));
			x->link=k;
			k->info=-1;
			k->link=NULL;
			break;
	case 4:
			k=z;
			printf("\n Enter the number you want to insert");
			scanf("%d",&num);
			printf("\n Enter the number after which you want to insert");
			scanf("%d",&check);
			while(k->info!=check)
			{
				k=k->link;
			}
			temp=k->link;
			x=k;
			k=(struct list*)malloc(sizeof(struct list));
			k->info=num;
			x->link=k;
			k->link=temp;
			break;
	}
	}while(i!=5);
}