Error in program

[shounakboss]

Here is my sample code... plz plz somebody help me with it... the error i am getting is for the function swap and i just need 2 call that....
thanx a lot

#include<stdio.h>
#include<conio.h>
struct list{
    int t1;          /* Storing roll number of a node */
    struct list *next, *head;    /* Storing next address */
};
/*****  Redefining struct list as node  *****/
typedef struct list node;
void main()
{
     node *head;
 head*= void swap(head);
 getch();
}
node* swap(node *current)
{
int t;                           /* Total number of nodes */
int rno;
node *temp;                      /* Temporary copy of current */
node *tmp;        
    node *roll_no;               /* Temporary variable */
    t=number(current);
    if(t<=1)
    {
        printf("\nYou cannot swap the only node\n");
        return(current);
    }
    printf("\nEnter number whose node you want to swap with the next\n");
    scanf("%d",&rno);
    temp=current;
    if(t==rno)
    {
        tmp=current->next;
        current->next=current->next->next;
        tmp->next=current;
        current=tmp;
        return(current);
    }
    else
    {
        while(temp->next->next!=NULL)
        {
            if(temp->next->t==rno)
            {
                tmp=temp->next->next;
                temp->next->next=temp->next->next->next;
                tmp->next=temp->next;
                temp->next=tmp;
                break;
            }
            temp=temp->next;
        }
        return(current);
    }
}

[ssharish2005]

while(temp->next != NULL)
{
   if(temp->t == rno)
   {
      tmp = temp->next;
      temp->next = temp->next->next;
      tmp->next = temp;
      break;
   }
   temp = temp->next;
}

ssharish

[shounakboss]

thanx a lot ssharish ... but i am getting error in function swap ..... where i am declaring

node* swap(node *current)

and calling it from

node *head;
head*= void swap(head);

is this correct ????

[ssharish2005]

head*= void swap(head);

This is not right. since you are returning the head node from the swap function again. You not getting the void you are getting node *.

So you will have to change that.

Can you be more specific on what error you are getting. That would help a lot.

EDIT: And forgot to mention you do not have function prototye for function Swap. Include this line on top your main function

node *swap(node *);

And your main should return a value.

int main()
{
   return 0;
}

And dont use getch(); which is a non standard function instead use getchar();

ssharish

[shounakboss]

i am getting error

Type mismatch in redeclaraiton of 'swap'

thanx a lot again ssharish

[ssharish2005]

int main()
{
   node *head;
   
   head = swap( head );
   
   getchar();
   return 0;
}

Right, Change the main to that. And before you can send the list to the swap function. You need to build the list. So you need to have one more function. Are you aware of that?

ssharish2005