I have two header files in the header directory of project , namely list.h and list-interface.h which contains the declaration of data types and declaration of functions on that data types,respectively.
//list.h
typedef struct Container{
int item;
struct Container *next;
}node;
//list-interface.h
node *first(node *);
......
//some other declarations.
Then in the resource directory i have list-methods.c.
//list-=methods.c
int is_last(node *lis_ptr, node *nod_ptr)
{
int islast = 0;
if (nod_ptr == last(lis_ptr))
islast = 1;
return islast;
}
//returns 1 if the second argumented pointer points to the first element of the list,pointed by first argumented pointer.other wise 0.
int is_first(node *lis_ptr, node *nod_ptr){
int isfirst = 0;
if (nod_ptr == first(lis_ptr))
isfirst = 1;
return isfirst;
}
//accessor methods------------------------------
//returns the pionter to first element in the list.
node* first(node *lis_ptr)
{
return lis_ptr;
}
//returns the pointer to last element in the list.
node *last(node *lis_ptr)
{
while (lis_ptr->next != NULL)
lis_ptr = lis_ptr->next;
return lis_ptr;
}
//This returns the pointer to the previous element to the node pointed by nod_ptr (second argument) in the list.
node *before(node *first_ptr, node *nod_ptr)
{
if (first_ptr == nod_ptr){
return NULL;
}
else{
while (first_ptr->next != nod_ptr)
first_ptr = first_ptr->next;
}
return first_ptr;
}
But when i compile the code for list-methods.c in visual studio 2013 i get the following error
node*(node *) differs in level of indirection from int().
please provide me with some solution.
