malloc undeclared error in simple linked list

hello,
i am trying to create a simple linked list, but i m getting one error there, below is my code:

#include <stdio.h>
#include <conio.h>
struct link
{
       int info;
       struct link *next;
};
int i;
struct link *start = NULL;
void createLinkList(struct link*);
void displayLinkList(struct link*);

/* Create the List */
void createLinkList(struct link *node)
{
     char ch;
     printf("Enter choice n for exit");
     ch = getchar();
     i=0;
     while(ch!='n')
     {
                   printf("\n Input the Node %d",i+1);
                   scanf("%d",&node->info);
                   node->next = (struct link*)malloc(sizeof(struct link));
                   node = node->next;
                   node->next = start;
                   i++;
                   printf("Input Choice n for break");
                   ch = getchar();                   
     }
}

/* Display the List */
void  displayLinkList(struct link *node)
{
      printf("\n Values of the entered node are as follows");
      while(node)
      {
                 printf(" %d",node->info);
                 node = node->next;
      }      
}
int main()
{
    struct link *node = (struct link*)malloc(sizeof(struct link));
    createLinkList(node);
    displayLinkList(node);
    getch();
    return 0;
}

Error is:

actually i wan not including the library file #include<stdlib.h>, therefore the error was.
but now i have included and the error is gone, but one got more error..

okay....
solved...