error in compilation of binary tree code in c

hi,
I have been asked to implement a binary tree structure with the foll requirements
1) Generate 1000 integers from 100,000,001 to 100,001,000
2) Create a collection and add first 500 integers
3) Delete 400 integers from 101st to 500th.
4) Add the rest of 500 integers
5) Find all the odd numbers in the collection and delete all of them.
6) Your inordertraversal function writes all the items in the collection into a file named output3.txt as below.
100000002
100000004
100000006
....
i have written the code with 3 files which are as follows:

Code:

////////////////////////////////////////
main.c
/////////////////////////////////
#include <assert.h>
#include <string.h>
#include <math.h>
#include "coll_a.h" /* import the specification */ 

collection myCollection;
int max_items;

int private_print(void *item);
int ItemCmp(void *a, void *b);

int main()
{ 
FILE *f1;
int i,j=100000000;
int intData[1000];
f1=fopen("out3.txt","wt"); 

/* Generating 1000 integers from 100,000,001 to 100,001,000 */
for (i =0; i <1000; i++)
{
intData[i] = ++j;
} 
max_items = 1000;
j = 0;
myCollection = ConsCollection(max_items,ItemCmp);
printf("adding 500 items\n");
for (i = 0; i <500; i++) 
{
AddToCollection(myCollection, (void *)&intData[j ++]);
}
printf("deleting 400 items\n");
for (i = 0; i <400; i++)
{
DeleteFromCollection(myCollection, (void *)&intData[--j]);
}
printf("adding the rest of 500 items\n");
j+=400;
for (i = 0; i <500; i++) 
{
AddToCollection(myCollection, (void *)&intData[++j]);
}
for (i=0;i <100;i++)
{
if((intData[i]%2)!=0)
{DeleteFromCollection(myCollection, (void *)&intData[i]);
}
for (i=500;i<1000;i++)
{
if((intData[i]%2)!=0)
{DeleteFromCollection(myCollection, (void *)&intData[i]);
}
} 
InOrderTraversal(c,private_print);
}

int ItemCmp(void *a, void *b)
{long *d1,*d2;
*d1=(long *)a;
*d2=(long *)b;
if(*d1>*d2)
return -1; 
else if(*d1<*d2)
return 1;
else
return 0; 
}
int private_print(void *item)
{long *t;
*t=(long *)item;
if(t!=NULL)
{printf("%d",*t ); 
fprintf (f1, "\n%d",*t);
}
else
{
return 0;
}
}

Code:

///////////////////////////////////////////
/////////////////////////////////////////////////////////
coll_a.h
///////////////////////////////////////
/* Specification for collection */

typedef struct t_collection *collection;

collection ConsCollection( int max_items, 
int (*ItemCmp)(void *, void *) );
/* Construct a new collection
Pre-condition: max_items > 0
Post-condition: returns a pointer to an empty collection
*/

void AddToCollection( collection c, void *item );
/* Add an item to a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(existing item count < max_items) &&
(item != NULL)
Post-condition: item has been added to c
*/

void DeleteFromCollection( collection c, void *item );
/* Delete an item from a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(existing item count >= 1) &&
(item != NULL)
Post-condition: item has been deleted from c
*/

void *FindInCollection( collection c, void *key );
/* Find an item in a collection
Pre-condition: c is a collection created by a call to
ConsCollection
key != NULL
Post-condition: returns an item identified by key if one
exists, otherwise returns NULL
*/

void InOrderTraversal(collection c, int(*private_print)(void *item))

Code:

//////////////////////////////////////////////////////////////
coll_at.c
///////////////////////////////////////
#include <stdlib.h> /* calloc */
#include <stdio.h> /* NULL */
#include <assert.h> /* Needed for assertions */
#include "coll_a.h" /* import the specification */ 

struct t_node
{
void *item;
struct t_node *left;
struct t_node *right;
} node;

struct t_collection
{
/* Note that size is not needed any longer! */
int (*ItemCmp)( void *, void * ); 
struct t_node *node;
};

collection ConsCollection(int max_items,
int (*ItemCmp)(void *,void *))
/* Construct a data collection
Pre-condition: (max_items > 0) && (item_size > 0) 
Post-condition: returns a pointer to an empty
collection
*/
{
collection c;
/* Although redundant, this assertion should be
retained as it tests compliance with the formal 
specification */
assert( max_items > 0 );
c = (collection)calloc( 1, sizeof(struct t_collection) );
c->node = (struct t_node *)0; 
c->ItemCmp = ItemCmp;
return c;
}

static void AddToTree( struct t_node **t, struct t_node *data,
int (*ItemCmp)(void *, void *) )
{
struct t_node *base; 
base = *t;
/* If it's a null tree, just add it here */
if ( base == NULL )
{
*t = data;
return;
}
else
{
if ( ItemCmp( base->item, data ) < 0 )
{
AddToTree( &(base->left), data, ItemCmp );
}
else 
AddToTree( &(base->right), data, ItemCmp );
}
}

void AddToCollection( collection c, void *item )
/* Add an item to a collection
Pre-condition: (c is a collection created by a call to 
ConsCollection) &&
(existing item count < max_items) &&
(item != NULL) 
Post-condition: item has been added to c
*/
{
struct t_node *data, *node_p;
assert( c != NULL );
assert( item != NULL );
/* Allocate space for a node for the data item */ 
data = (struct t_node *)malloc(sizeof(struct t_node));
/* Attach the item to the node */
data->item = item;
data->left = data->right = (struct t_node *)0;
node_p = c->node; 
AddToTree( &node_p, data, c->ItemCmp );
c->node=node_p;
}



void DeleteFromTree( struct t_node **t, void *item )
{
struct t_node *temp, *prev, *succ;
prev=temp=*t; 
void *val;
*val=(void*)item;
//val=item;
if(*t==NULL)
printf("NO NODES TO BE DELETED");
else
{ 
while(temp->item!=val && temp!=NULL) //define val
{
prev=temp; 
if(temp->item >val)
temp=temp->left;
else 
temp=temp->right;
} 
if(temp==NULL)
{
printf("the value could not be found\n");
return; 
} 
if(temp->left!=NULL && temp->right!=NULL)
{ 
prev=temp;
succ=temp->right;
while(succ->left!=NULL) 
{
prev=succ;
succ=succ->left; 
}
temp->item=succ->item;
temp=succ; 
}
if(temp->left!=NULL && temp->right==NULL)
{ 
if(prev->left==temp)
prev->left=temp->left;
else
prev->right=temp->left;
} 
if(temp->left==NULL && temp->right!=NULL)
{
if(prev->left==temp) 
prev->left=temp->right;
else
prev->right=temp->right; 
}
if(temp->left==NULL && temp->right==NULL)
{ 
if(prev->left==temp)
prev->left=NULL;
else 
prev->right=NULL;
}
/* if(temp==*root) // define root
{
if(temp->left!=NULL)
*root=temp->left; 
else
*root=temp->right;
}*/
free(temp);
}


void DeleteFromCollection( collection c, void *item )
/* Delete an item from a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) && 
(existing item count >= 1) &&
(item != NULL)
Post-condition: item has been deleted from c
*/
{
struct t_node *node;
assert( c != NULL );
/* The requirement that the collection has at least
one item is expressed a little differently */
assert( c->node != NULL ); 
assert( item != NULL);
/* Select node at head of list */
node = c->node;
DeleteFromTree( &node, item );
c->node=node;
}

void *FindInTree( struct t_node *t, void *key )
{
if(t==NULL)
return;
else if(t->item==key)
return t;
else if ( ItemCmp( t->item, key ) < 0 ) 
return FindInTree( (t->left), key );
else
return FindInTree( (t->right), key );
}





void *FindInCollection( collection c, void *key )
/* Find an item in a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(key != NULL) 
Post-condition: returns an item identified by key if
one exists, otherwise returns NULL
*/
{
struct t_node *node;
assert( c != NULL ); 
assert( key != NULL );
/* Select node at head of list */
node = c->node;
return FindInTree( node, key );
}
}



void InOrderTreeTraversal(struct t_node *t, int(*private_print)(void *item))
{
if(t != NULL)
{
InOrderTreeTraversal(t->left,private_print);
private_print(t->item);
InOrderTreeTraversal(t->right, private_print);
}
}

void InOrderTraversal(collection c, int(*private_print)(void *item))
{
assert(c != NULL);
InOrderTreeTraversal(c->node,private_print);
}
////////////////////////////////

Here are the errors which I get on compiling.

ont> gcc -c main.c coll_at.c
main.c: In function `InOrderTraversal':
main.c:17: error: syntax error before '{' token
main.c:20: error: parameter `j' is initialized
main.c:22: error: syntax error before "f1"
coll_at.c: In function `InOrderTraversal':
coll_at.c:13: warning: structure defined inside parms
coll_at.c:20: warning: structure defined inside parms
coll_at.c:20: warning: empty declaration
coll_at.c:23: error: syntax error before ')' token
coll_at.c:92: error: syntax error before '*' token

 

Determine what you really want here:

Code:

int(*private_print)(void *item)

and express it correctly. Also, add indentation/formatting to your code. Even though Shabbir put it in code tags, it is still too hard to read; I don't want to mess with it.

 

ok, let me try to put it again

Code:

////////////////////
main.c
////////////////////
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "coll_a.h"     /* import the specification */ 


int (*private_print)(void *item);
int (*ItemCmp)(void *a, void *b);
  
int main();
{ 
  collection myCollection;
  int max_items;
  FILE *f1;
  int i;
  int j;
  j=100000000;
  int intData[1000];
  f1=fopen("out3.txt","wt");   

/* Generating 1000 integers from 100,000,001 to 100,001,000 */
  for (i =0; i <1000; i++)
  {
    intData[i] = ++j;
   } 

  printf("Testing Part A....\n\n");
  max_items = 1000;
  j = 0;
  myCollection = ConsCollection(max_items,ItemCmp);
  printf("adding 500 items\n");
  for (i = 0; i <500; i++) 
  {
    AddToCollection(myCollection, (void *)&intData[j ++]);
  }

  printf("deleting 400 items\n");
  for (i = 0; i <400; i++)
  {
    DeleteFromCollection(myCollection, (void *)&intData[--j]);
  }

  printf("adding the rest of 500 items\n");
  j+=400;
  for (i = 0; i <500; i++) 
  {
    AddToCollection(myCollection, (void *)&intData[++j]);
  }
  
  for (i=0;i <100;i++)
  {
   if((intData[i]%2)!=0)
      {
	   DeleteFromCollection(myCollection, (void *)&intData[i]);
      }
  }
  for (i=500;i<1000;i++)
  {
   if((intData[i]%2)!=0)
       { 
	   DeleteFromCollection(myCollection, (void *)&intData[i]);
       }
  } 
  InOrderTraversal(c,private_print);
}

  int ItemCmp(void *a, void *b)
 {
    long *d1,*d2;
   *d1=(long *)a;
   *d2=(long *)b;
   if(*d1>*d2)
     return -1; 
   else if(*d1<*d2)
     return 1;
   else
     return 0; 
  }

  int private_print(void *item)
 {  long *t;
   *t=(long *)item;
   if(t!=NULL)
     {printf("%d",*t ); 
      fprintf (f1, "\n%d",*t);
      }
   else
     {
	return 0;
      }
  }

Code:

/////////////////////////////////////
coll_at.c
////////////////////////////////
#include <stdlib.h>    /* calloc */
#include <stdio.h>      /* NULL */

#include <assert.h>     /* Needed for assertions */
#include "coll_a.h"     /* import the specification */ 


struct t_node
{
       void *item;
       struct t_node *left;
       struct t_node *right;
} node;

struct t_collection
{
       /* Note that size is not needed any longer! */
       int (*ItemCmp)( void *, void * ); 
       struct t_node *node;
};

collection ConsCollection(int max_items, int (*ItemCmp)(void *,void *))
/* Construct a data collection
       Pre-condition: (max_items > 0) && (item_size > 0) 
       Post-condition: returns a pointer to an empty
collection
*/
       {
       collection c;
       /* Although redundant, this assertion should be
               retained as it tests compliance with the formal 
                         specification */
       assert( max_items > 0 );
       c = (collection)calloc( 1, sizeof(struct t_collection) );
       c->node = (struct t_node *)0; 
       c->ItemCmp = ItemCmp;
       return c;
       }

static void AddToTree( struct t_node **t, struct t_node *data,
                       int (*ItemCmp)(void *, void *) )
       {
       struct t_node *base; 
       base = *t;
       /* If it's a null tree, just add it here */
       if ( base == NULL )
               {
               *t = data;
               return;
               }
       else
               {
               if ( ItemCmp( base->item, data ) < 0 )
                       {
                       AddToTree( &(base->left), data, ItemCmp );
                       }
               else 
                       AddToTree( &(base->right), data, ItemCmp );
               }
       }

void AddToCollection( collection c, void *item )
/* Add an item to a collection
       Pre-condition: (c is a collection created by a call to 
                                        ConsCollection) &&
                                               (existing item count < max_items) &&
                                               (item != NULL) 
       Post-condition: item has been added to c
*/
       {
       struct t_node *data, *node_p;
       assert( c != NULL );
       assert( item != NULL );
       /* Allocate space for a node for the data item */ 
       data = (struct t_node *)malloc(sizeof(struct t_node));
       /* Attach the item to the node */
       data->item = item;
       data->left = data->right = (struct t_node *)0;
       node_p = c->node; 
       AddToTree( &node_p, data, c->ItemCmp );
       c->node=node_p;
       }



void DeleteFromTree( struct t_node **t, void *item )
{
                                struct t_node *temp, *prev, *succ;
                                prev=temp=*t; 
                                void *val;
		*val=(void*)item;
										if(*t==NULL)
                                       printf("NO NODES TO BE DELETED");
                               else
                                       { 
                                        while(temp->item!=val && temp!=NULL)  //define val
                                                       {
                                                               prev=temp; 
                                                               if(temp->item >val)
                                                               temp=temp->left;
                                                               else 
                                                               temp=temp->right;
                                                       }            
                                                       if(temp==NULL)
                                                       {
                                                                       printf("the value could not be found\n");
                                                                       return; 
                                                       }                                     
                                                       if(temp->left!=NULL && temp->right!=NULL)
                                                       { 
                                                               prev=temp;
                                                               succ=temp->right;
                                                               while(succ->left!=NULL) 
                                                               {
                                                                       prev=succ;
                                                                       succ=succ->left; 
                                                               }
                                                               temp->item=succ->item;
                                                               temp=succ; 
                                                       }
                                                       if(temp->left!=NULL && temp->right==NULL)
                                                       { 
                                                                               if(prev->left==temp)
                                                                               prev->left=temp->left;
                                                                               else
                                                                               prev->right=temp->left;
                                                       } 
                                                       if(temp->left==NULL && temp->right!=NULL)
                                                       {
                                                                               if(prev->left==temp) 
                                                                               prev->left=temp->right;
                                                                               else
                                                                               prev->right=temp->right; 
                                                       }
                                                       if(temp->left==NULL && temp->right==NULL)
                                                       { 
                                                                       if(prev->left==temp)
                                                                       prev->left=NULL;
                                                                       else 
                                                                       prev->right=NULL;
                                                       }
                                                     /*  if(temp==*root)                      // define root
                                                       {
                                                               if(temp->left!=NULL)
                                                               *root=temp->left; 
                                                               else
                                                               *root=temp->right;
                                                       }*/
                       free(temp);
}


void DeleteFromCollection( collection c, void *item )
/* Delete an item from a collection
       Pre-condition: (c is a collection created by a call to
                                                       ConsCollection) && 
                                               (existing item count >= 1) &&
                                               (item != NULL)
       Post-condition: item has been deleted from c
*/
       {
       struct t_node *node;
       assert( c != NULL );
                 /* The requirement that the collection has at least
                         one item is expressed a little differently */
       assert( c->node != NULL ); 
       assert( item != NULL);
       /* Select node at head of list */
       node = c->node;
       DeleteFromTree( &node, item );
       c->node=node;
       }

void *FindInTree( struct t_node *t, void *key )
       {
                               if(t==NULL)
                                return;
                               else if(t->item==key)
                                return t;
                               else if ( ItemCmp( t->item, key ) < 0 ) 
                                return FindInTree( (t->left), key );
                               else
                                return FindInTree( (t->right), key );
               }

void *FindInCollection( collection c, void *key )
/* Find an item in a collection
       Pre-condition: (c is a collection created by a call to
ConsCollection) &&
                                               (key != NULL) 
       Post-condition: returns an item identified by key if
                                                 one exists, otherwise returns NULL
*/
       {
       struct t_node *node;
       assert( c != NULL ); 
       assert( key != NULL );
       /* Select node at head of list */
       node = c->node;
       return FindInTree( node, key );
       }
}

 
 void InOrderTreeTraversal(struct t_node *t, int(*private_print)(void *item))
{
       if(t != NULL)
       {
               InOrderTreeTraversal(t->left,private_print);
               private_print(t->item);
               InOrderTreeTraversal(t->right, private_print);
       }
}

void InOrderTraversal(collection c, int(*private_print)(void *item))
{
       assert(c != NULL);
       InOrderTreeTraversal(c->node,private_print);
}

Code:

//////////////////////////////////////
coll_a.h
/////////////////////////////////
/* Specification for collection */

typedef struct t_collection *collection;

collection ConsCollection( int max_items, 
		int (*ItemCmp)(void *, void *) );
/* Construct a new collection
   Pre-condition: max_items > 0
   Post-condition: returns a pointer to an empty collection
*/

void AddToCollection( collection c, void *item );
/* Add an item to a collection
   Pre-condition: (c is a collection created by a call to
                       ConsCollection) &&
                  (existing item count < max_items) &&
                  (item != NULL)
   Post-condition: item has been added to c
*/

void DeleteFromCollection( collection c, void *item );
/* Delete an item from a collection
   Pre-condition: (c is a collection created by a call to
                     ConsCollection) &&
                  (existing item count >= 1) &&
         	  (item != NULL)
   Post-condition: item has been deleted from c
*/

void *FindInCollection( collection c, void *key );
/* Find an item in a collection
   Pre-condition: c is a collection created by a call to
                     ConsCollection
                  key != NULL
   Post-condition: returns an item identified by key if one
                   exists, otherwise returns NULL
*/

void InOrderTraversal(collection c, int(*private_print)(void *item))
/////////////////////////////////////////////////////////

the compile time errors which I am unable to solve

ont> gcc -c main.c coll_at.c
main.c: In function `InOrderTraversal':
main.c:15: error: old-style parameter declarations in prototyped function definition
main.c:34: error: `ItemCmp' undeclared (first use in this function)
main.c:34: error: (Each undeclared identifier is reported only once
main.c:34: error: for each function it appears in.)
main.c: In function `ItemCmp':
main.c:73: warning: assignment makes integer from pointer without a cast
main.c:74: warning: assignment makes integer from pointer without a cast
main.c: In function `private_print':
main.c:85: warning: assignment makes integer from pointer without a cast
main.c:88: error: `f1' undeclared (first use in this function)
main.c:93: error: syntax error at end of input
coll_at.c: In function `InOrderTraversal':
coll_at.c:13: warning: structure defined inside parms
coll_at.c:20: warning: structure defined inside parms
coll_at.c:20: warning: empty declaration
coll_at.c:29: error: syntax error before '{' token
coll_at.c:92: error: syntax error before '*' token

i hope the code is now acceptable for a review
thanks a lot

 

Are you even looking at your own post? Please follow this link.

 

main.c

Code:

#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "coll_a.h" /* import the specification */ 


int (*private_print)(void *item);
int (*ItemCmp)(void *a, void *b);

int main();
{ 
collection myCollection;
int max_items;
FILE *f1;
int i;
int j;
j=100000000;
int intData[1000];
f1=fopen("out3.txt","wt"); 

/* Generating 1000 integers from 100,000,001 to 100,001,000 */
for (i =0; i <1000; i++)
{
intData[i] = ++j;
} 

printf("Testing Part A....\n\n");
max_items = 1000;
j = 0;
myCollection = ConsCollection(max_items,ItemCmp);
printf("adding 500 items\n");
for (i = 0; i <500; i++) 
{
AddToCollection(myCollection, (void *)&intData[j ++]);
}

printf("deleting 400 items\n");
for (i = 0; i <400; i++)
{
DeleteFromCollection(myCollection, (void *)&intData[--j]);
}

printf("adding the rest of 500 items\n");
j+=400;
for (i = 0; i <500; i++) 
{
AddToCollection(myCollection, (void *)&intData[++j]);
}

for (i=0;i <100;i++)
{
if((intData[i]%2)!=0)
{
DeleteFromCollection(myCollection, (void *)&intData[i]);
}
}
for (i=500;i<1000;i++)
{
if((intData[i]%2)!=0)
{ 
DeleteFromCollection(myCollection, (void *)&intData[i]);
}
} 
InOrderTraversal(c,private_print);
}

int ItemCmp(void *a, void *b)
{
long *d1,*d2;
*d1=(long *)a;
*d2=(long *)b;
if(*d1>*d2)
return -1; 
else if(*d1<*d2)
return 1;
else
return 0; 
}

int private_print(void *item)
{ long *t;
*t=(long *)item;
if(t!=NULL)
{printf("%d",*t ); 
fprintf (f1, "\n%d",*t);
}
else
{
return 0;
}
}

coll_at.c

Code:

#include <stdlib.h> /* calloc */
#include <stdio.h> /* NULL */

#include <assert.h> /* Needed for assertions */
#include "coll_a.h" /* import the specification */ 


struct t_node
{
void *item;
struct t_node *left;
struct t_node *right;
} node;

struct t_collection
{
/* Note that size is not needed any longer! */
int (*ItemCmp)( void *, void * ); 
struct t_node *node;
};

collection ConsCollection(int max_items, int (*ItemCmp)(void *,void *))
/* Construct a data collection
Pre-condition: (max_items > 0) && (item_size > 0) 
Post-condition: returns a pointer to an empty
collection
*/
{
collection c;
/* Although redundant, this assertion should be
retained as it tests compliance with the formal 
specification */
assert( max_items > 0 );
c = (collection)calloc( 1, sizeof(struct t_collection) );
c->node = (struct t_node *)0; 
c->ItemCmp = ItemCmp;
return c;
}

static void AddToTree( struct t_node **t, struct t_node *data,
int (*ItemCmp)(void *, void *) )
{
struct t_node *base; 
base = *t;
/* If it's a null tree, just add it here */
if ( base == NULL )
{
*t = data;
return;
}
else
{
if ( ItemCmp( base->item, data ) < 0 )
{
AddToTree( &(base->left), data, ItemCmp );
}
else 
AddToTree( &(base->right), data, ItemCmp );
}
}

void AddToCollection( collection c, void *item )
/* Add an item to a collection
Pre-condition: (c is a collection created by a call to 
ConsCollection) &&
(existing item count < max_items) &&
(item != NULL) 
Post-condition: item has been added to c
*/
{
struct t_node *data, *node_p;
assert( c != NULL );
assert( item != NULL );
/* Allocate space for a node for the data item */ 
data = (struct t_node *)malloc(sizeof(struct t_node));
/* Attach the item to the node */
data->item = item;
data->left = data->right = (struct t_node *)0;
node_p = c->node; 
AddToTree( &node_p, data, c->ItemCmp );
c->node=node_p;
}



void DeleteFromTree( struct t_node **t, void *item )
{
struct t_node *temp, *prev, *succ;
prev=temp=*t; 
void *val;
*val=(void*)item;
if(*t==NULL)
printf("NO NODES TO BE DELETED");
else
{ 
while(temp->item!=val && temp!=NULL) //define val
{
prev=temp; 
if(temp->item >val)
temp=temp->left;
else 
temp=temp->right;
} 
if(temp==NULL)
{
printf("the value could not be found\n");
return; 
} 
if(temp->left!=NULL && temp->right!=NULL)
{ 
prev=temp;
succ=temp->right;
while(succ->left!=NULL) 
{
prev=succ;
succ=succ->left; 
}
temp->item=succ->item;
temp=succ; 
}
if(temp->left!=NULL && temp->right==NULL)
{ 
if(prev->left==temp)
prev->left=temp->left;
else
prev->right=temp->left;
} 
if(temp->left==NULL && temp->right!=NULL)
{
if(prev->left==temp) 
prev->left=temp->right;
else
prev->right=temp->right; 
}
if(temp->left==NULL && temp->right==NULL)
{ 
if(prev->left==temp)
prev->left=NULL;
else 
prev->right=NULL;
}
/* if(temp==*root) // define root
{
if(temp->left!=NULL)
*root=temp->left; 
else
*root=temp->right;
}*/
free(temp);
}


void DeleteFromCollection( collection c, void *item )
/* Delete an item from a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) && 
(existing item count >= 1) &&
(item != NULL)
Post-condition: item has been deleted from c
*/
{
struct t_node *node;
assert( c != NULL );
/* The requirement that the collection has at least
one item is expressed a little differently */
assert( c->node != NULL ); 
assert( item != NULL);
/* Select node at head of list */
node = c->node;
DeleteFromTree( &node, item );
c->node=node;
}

void *FindInTree( struct t_node *t, void *key )
{
if(t==NULL)
return;
else if(t->item==key)
return t;
else if ( ItemCmp( t->item, key ) < 0 ) 
return FindInTree( (t->left), key );
else
return FindInTree( (t->right), key );
}

void *FindInCollection( collection c, void *key )
/* Find an item in a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(key != NULL) 
Post-condition: returns an item identified by key if
one exists, otherwise returns NULL
*/
{
struct t_node *node;
assert( c != NULL ); 
assert( key != NULL );
/* Select node at head of list */
node = c->node;
return FindInTree( node, key );
}
}


void InOrderTreeTraversal(struct t_node *t, int(*private_print)(void *item))
{
if(t != NULL)
{
InOrderTreeTraversal(t->left,private_print);
private_print(t->item);
InOrderTreeTraversal(t->right, private_print);
}
}

void InOrderTraversal(collection c, int(*private_print)(void *item))
{
assert(c != NULL);
InOrderTreeTraversal(c->node,private_print);
}

coll_a.h

Code:

/* Specification for collection */

typedef struct t_collection *collection;

collection ConsCollection( int max_items, 
int (*ItemCmp)(void *, void *) );
/* Construct a new collection
Pre-condition: max_items > 0
Post-condition: returns a pointer to an empty collection
*/

void AddToCollection( collection c, void *item );
/* Add an item to a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(existing item count < max_items) &&
(item != NULL)
Post-condition: item has been added to c
*/

void DeleteFromCollection( collection c, void *item );
/* Delete an item from a collection
Pre-condition: (c is a collection created by a call to
ConsCollection) &&
(existing item count >= 1) &&
(item != NULL)
Post-condition: item has been deleted from c
*/

void *FindInCollection( collection c, void *key );
/* Find an item in a collection
Pre-condition: c is a collection created by a call to
ConsCollection
key != NULL
Post-condition: returns an item identified by key if one
exists, otherwise returns NULL
*/

void InOrderTraversal(collection c, int(*private_print)(void *item))

the compile time errors which I am unable to solve

ont> gcc -c main.c coll_at.c
main.c: In function `InOrderTraversal':
main.c:15: error: old-style parameter declarations in prototyped function definition
main.c:34: error: `ItemCmp' undeclared (first use in this function)
main.c:34: error: (Each undeclared identifier is reported only once
main.c:34: error: for each function it appears in.)
main.c: In function `ItemCmp':
main.c:73: warning: assignment makes integer from pointer without a cast
main.c:74: warning: assignment makes integer from pointer without a cast
main.c: In function `private_print':
main.c:85: warning: assignment makes integer from pointer without a cast
main.c:88: error: `f1' undeclared (first use in this function)
main.c:93: error: syntax error at end of input
coll_at.c: In function `InOrderTraversal':
coll_at.c:13: warning: structure defined inside parms
coll_at.c:20: warning: structure defined inside parms
coll_at.c:20: warning: empty declaration
coll_at.c:29: error: syntax error before '{' token
coll_at.c:92: error: syntax error before '*' token

 

What happened. does nobody have a clue about this?

 

You appear to be the one that is clueless. Because your code is not indented, I won't look at it. I did look at the messages and give you a tip, which you seem to be ignoring. I'll give you one more, then I expect you to help us help you by presenting decently formatted code. This is wrong:

Code:

int main()[COLOR=Red];[/COLOR]
{