[reynaud0000]

void delete(){   
    
     int dlt;
     int p = ptr->id;
     printf("delete ID: ");
     scanf("%d" ,dlt);
     if (dlt == p){
          free (ptr->id);
     }   
     system("PAUSE");   
}

Can anyone tell me why it gives me this error

passing arg 1 of `free' makes pointer from integer without a cast

This post has been edited by reynaud0000: 22 June 2011 - 02:07 PM

[sepp2k]

You get that error because ptr->id is an integer and you're passing it to free, which wants a pointer, not an integer (specifically you should only ever pass pointers to memory which has been allocated by malloc to free).

Another error in your code is that the second argument to scanf should be a pointer to an integer, not an integer. You probably want to pass &dlt here instead of dlt.