This program is suppose to be a spell checking program and I just can not get it to work can someone please take a look and let me know what I need to do to fix it

#include <stdio.h>
#include <string.h>
#include <stdlib.h>


//CONSTANTS 
#define wrdlen [48] 
#define linelen [1024]


// A struct representing a node in a binary search tree

struct BSTnode
{  
char word[wrdlen];// The contents of the node	
struct BSTnode* left;// Links to the node's left and right children
struct BSTnode* right;
};

// Adds a new node to the tree. Duplicates are disallowed. Returns 1 if a
// new node was added, returns 0 if newdata was already in the tree
int insert(struct BSTnode** root, char newword[wrdlen])
{
    // If we've reached the right place to insert, create a new node and add it in
	if( (*root) == NULL)
	{
		(*root) = (struct BSTnode*)malloc(sizeof(struct BSTnode));
        strcpy((*root)->word,newword);
		(*root)->left = NULL;
		(*root)->right = NULL;
		return 1;
	}
    // Otherwise, search for the correct place to insert

	if(strcmp(newword,(*root)->word)<0)
	{
		return insert( &((*root)->left), newword);
	}

	else if(strcmp(newword,(*root)->word)>0)
	{
		return insert( &((*root)->right), newword);
	}
// If the new data is neither less than nor greater than the the data at
// the current node, it must be equal, and duplicates are not allowed
	else
	return 0;
}

// Returns 1 if target is in the tree and 0 otherwise
int search(struct BSTnode* root, char target[wrdlen])
{
    // An empty tree contains nothing, much less target
	if(root == NULL)
		return 0;
	// If the current node is what we're looking for, we've found it 

	if(strcmp(root->word,target) == 0)
		return 1;
    // If what we're looking for is smaller than this node, it must be in
    // the left subtree if it exists
	if(strcmp(target,root->word) < 0)
		return search(root->left, target);
	// Similarly, if the target is greater than this node, it can only be in
    // the right subtree
	else
	return search(root->right, target);
}

// An iterative version of the search algorithm
int searchiterative(struct BSTnode* root, char target[wrdlen])
{
	struct BSTnode* crnt = root; 
	// Keep descending through the tree until we reach the bottom or find what
	// we're looking for
	while(crnt != NULL && strcmp(crnt->word,target)!=0)
	{
		if(strcmp(target,crnt->word)>0)
		crnt = crnt->left;

		else
		crnt = crnt->right;
	}
	// If we reached the bottom of the tree, then the target isn't present,
	// otherwise we found what we're looking for
	if(crnt == NULL)
		return 0;
	
	else
		return 1;
}

void spellcheck(struct BSTnode* root, char *token, int line)
{
    //capital letters are from 65 -> 90
    //lowercase letters are from 97-122  
    if(search(root, token))//if you find it normally then 
      return;

     else if(token[0] >= 65 && token[0] <= 90)
     {
          token[0] = token[0] + 32;
          if(search(root, token))
             return;

          else
          {   
              token[0] = token[0] - 32;
              printf("Line %d: %s\n", line, token); 
              return;
          }
     }

     else
     {
         printf("Line %d: %s\n", line, token);
         return;
     }
}


int main(void)
{
    FILE *ifp; //dictionary file
    FILE *scfp; //file to be spellchecked
    char infile[wrdlen]; //"words.txt";
    char Tinfile[wrdlen]; //"test.txt"; //test file
    int valid = 0;
    struct BSTnode* root;
    char newword[wrdlen];
    root = NULL;
    int i = 0;
    char str[linelen];
    char delims[] = ("~!@#$%^&*()-_=+[]{}\\|;:\'\",.<>/?\n\r\t ");
     

    //ask the user for the dictionary file
    while(!valid)
    {
         printf("Please enter the name of the dictionary file you wish to access\n");
         scanf("%s", infile);
         ifp = fopen(infile, "r");         

         if(ifp == NULL)
           printf("sorry, could not find that file!\n");
         else
         {   
             valid = 1;
             printf("Reading file now.........\n");
         }
    }    
    valid = 0;
    //read in all the words and place them into a BST
    while(!feof(ifp))
    {
        fscanf(ifp, "%s ", newword);
        insert(&root, newword);
    }   

    //ask the user for the file to be spellchecked
    while(!valid)
    {
		printf("what is the name of the file you would like to spellcheck?\n");
		scanf("%s", Tinfile);
		scfp = fopen(Tinfile, "r");
		if(scfp == NULL)
           printf("sorry, could not find that file!\n");
		else
		{   
             valid = 1;
             printf("Reading file now.........\n");
		}
    }    

    printf("The following words were not recognized: \n");    

    for(i = 1; !feof(scfp); i++)
    {
     	fgets(str, linelen, scfp);
		char *token;
		token = strtok(str, delims);          

		while( token != NULL ) 
		{
			spellcheck(root, token, i);    
			token = strtok( NULL, delims );
	    }    
    }
	system("PAUSE");
    return; 
}

Here is the new code I have got it down to just three errors. yea! I can still use some help with it though

#include <stdio.h>
#include <string.h>
#include <stdlib.h>


//CONSTANTS 
#define wrdlen 48 
#define linelen 1024


// A struct representing a node in a binary search tree

struct BSTnode
{  
char word[wrdlen];// The contents of the node	
struct BSTnode* left;// Links to the node's left and right children
struct BSTnode* right;
};

// Adds a new node to the tree. Duplicates are disallowed. Returns 1 if a
// new node was added, returns 0 if newdata was already in the tree
int insert(struct BSTnode** root, char newword[wrdlen])
{
    // If we've reached the right place to insert, create a new node and add it in
	if( (*root) == NULL)
	{
		(*root) = (struct BSTnode*)malloc(sizeof(struct BSTnode));
        strcpy((*root)->word,newword);
		(*root)->left = NULL;
		(*root)->right = NULL;
		return 1;
	}
    // Otherwise, search for the correct place to insert

	if(strcmp(newword,(*root)->word)<0)
	{
		return insert( &((*root)->left), newword);
	}

	else if(strcmp(newword,(*root)->word)>0)
	{
		return insert( &((*root)->right), newword);
	}
// If the new data is neither less than nor greater than the the data at
// the current node, it must be equal, and duplicates are not allowed
	else
	return 0;
}

// Returns 1 if target is in the tree and 0 otherwise
int search(struct BSTnode* root, char target[wrdlen])
{
    // An empty tree contains nothing, much less target
	if(root == NULL)
		return 0;
	// If the current node is what we're looking for, we've found it 

	if(strcmp(root->word,target) == 0)
		return 1;
    // If what we're looking for is smaller than this node, it must be in
    // the left subtree if it exists
	if(strcmp(target,root->word) < 0)
		return search(root->left, target);
	// Similarly, if the target is greater than this node, it can only be in
    // the right subtree
	else
	return search(root->right, target);
}

// An iterative version of the search algorithm
int searchiterative(struct BSTnode* root, char target[wrdlen])
{
	struct BSTnode* crnt = root; 
	// Keep descending through the tree until we reach the bottom or find what
	// we're looking for
	while(crnt != NULL && strcmp(crnt->word,target)!=0)
	{
		if(strcmp(target,crnt->word)>0)
		crnt = crnt->left;

		else
		crnt = crnt->right;
	}
	// If we reached the bottom of the tree, then the target isn't present,
	// otherwise we found what we're looking for
	if(crnt == NULL)
		return 0;
	
	else
		return 1;
}

void spellcheck(struct BSTnode* root, char *token, int line)
{
    //capital letters are from 65 -> 90
    //lowercase letters are from 97-122  
    if(search(root, token))//if you find it normally then 
      return;

     else if(token[0] >= 65 && token[0] <= 90)
     {
          token[0] = token[0] + 32;
          if(search(root, token))
             return;

          else
          {   
              token[0] = token[0] - 32;
              printf("Line %d: %s\n", line, token); 
              return;
          }
     }

     else
     {
         printf("Line %d: %s\n", line, token);
         return;
     }
}


int main(void)
{
    FILE *ifp; //dictionary file
    FILE *scfp; //file to be spellchecked
    char infile[wrdlen]; //"words.txt";
    char Tinfile[wrdlen]; //"test.txt"; //test file
    int valid = 0;
    struct BSTnode* root;
    char newword[wrdlen];
    int i = 0;
    char str[linelen];
	char delims[] = {"~!@#$%^&*()-_=+[]{}\\|;:\'\",.<>/?\n\r\t ""};
	char *token;
     

    //ask the user for the dictionary file
    while(!valid)
    {
         printf("Please enter the name of the dictionary file you wish to access\n");
         scanf("%s", infile);
         ifp = fopen(infile, "r");         

         if(ifp == NULL)
           printf("sorry, could not find that file!\n");
         else
         {   
             valid = 1;
             printf("Reading file now.........\n");
         }
    }    
    valid = 0;
    //read in all the words and place them into a BST
    while(!feof(ifp))
    {
        fscanf(ifp, "%s ", newword);
        insert(&root, newword);
    }   

    //ask the user for the file to be spellchecked
    while(!valid)
    {
		printf("what is the name of the file you would like to spellcheck?\n");
		scanf("%s", Tinfile);
		scfp = fopen(Tinfile, "r");
		if(scfp == NULL)
           printf("sorry, could not find that file!\n");
		else
		{   
             valid = 1;
             printf("Reading file now.........\n");
		}
    }    

    printf("The following words were not recognized: \n");    

    for(i = 1; !feof(scfp); i++)
    {
     	fgets(str, linelen, scfp);
		
		token = strtok(str, delims);          

		while( token != NULL ) 
		{
			spellcheck(root, token, i);    
			token = strtok( NULL, delims );
	    }    
    }
	system("PAUSE");
    return 0; 
}

I got all the errors fixed but now it is crashing. it crashes when the program reads the dictionary file

#include <stdio.h>
#include <string.h>
#include <stdlib.h>


//CONSTANTS 
#define wrdlen 48 
#define linelen 1024


// A struct representing a node in a binary search tree

struct BSTnode
{  
char word[wrdlen];// The contents of the node	
struct BSTnode* left;// Links to the node's left and right children
struct BSTnode* right;

};

// Adds a new node to the tree. Duplicates are disallowed. Returns 1 if a
// new node was added, returns 0 if newdata was already in the tree
int insert(struct BSTnode** root, char newword[wrdlen])
{
    // If we've reached the right place to insert, create a new node and add it in
	if( (*root) == NULL)
	{
		(*root) = (struct BSTnode*)malloc(sizeof(struct BSTnode));
        strcpy((*root)->word,newword);
		(*root)->left = NULL;
		(*root)->right = NULL;
		return 1;
	}
    // Otherwise, search for the correct place to insert

	if(strcmp(newword,(*root)->word)<0)
	{
		return insert( &((*root)->left), newword);
	}

	else if(strcmp(newword,(*root)->word)>0)
	{
		return insert( &((*root)->right), newword);
	}
// If the new data is neither less than nor greater than the the data at
// the current node, it must be equal, and duplicates are not allowed
	else
	return 0;
}

// Returns 1 if target is in the tree and 0 otherwise
int search(struct BSTnode* root, char target[wrdlen])
{
    // An empty tree contains nothing, much less target
	if(root == NULL)
		return 0;
	// If the current node is what we're looking for, we've found it 

	if(strcmp(root->word,target) == 0)
		return 1;
    // If what we're looking for is smaller than this node, it must be in
    // the left subtree if it exists
	if(strcmp(target,root->word) < 0)
		return search(root->left, target);
	// Similarly, if the target is greater than this node, it can only be in
    // the right subtree
	else
	return search(root->right, target);
}

// An iterative version of the search algorithm
int searchiterative(struct BSTnode* root, char target[wrdlen])
{
	struct BSTnode* crnt = root; 
	// Keep descending through the tree until we reach the bottom or find what
	// we're looking for
	while(crnt != NULL && strcmp(crnt->word,target)!=0)
	{
		if(strcmp(target,crnt->word)>0)
		crnt = crnt->left;

		else
		crnt = crnt->right;
	}
	// If we reached the bottom of the tree, then the target isn't present,
	// otherwise we found what we're looking for
	if(crnt == NULL)
		return 0;
	
	else
		return 1;
}

void spellcheck(struct BSTnode* root, char *token, int line)
{
    //capital letters are from 65 -> 90
    //lowercase letters are from 97-122  
    if(search(root, token))//if you find it normally then 
      return;

     else if(token[0] >= 65 && token[0] <= 90)
     {
          token[0] = token[0] + 32;
          if(search(root, token))
             return;

          else
          {   
              token[0] = token[0] - 32;
              printf("Line %d: %s\n", line, token); 
              return;
          }
     }

     else
     {
         printf("Line %d: %s\n", line, token);
         return;
     }
}


int main(void)
{
    FILE *ifp; //dictionary file
    FILE *scfp; //file to be spellchecked
    char infile[wrdlen]; //"words.txt";
    char Tinfile[wrdlen]; //"test.txt"; //test file
    int valid = 0;
    struct BSTnode* root;
    char newword[wrdlen];
    int i = 0;
    char str[linelen];
	char delims[] = {"~!@#$%^&*()-_=+[]{}\\|;:\'\",.<>/?\n\r\t "};
	char *token;
	
     

    //ask the user for the dictionary file
    while(!valid)
    {
         printf("Please enter the name of the dictionary file you wish to access\n");
         scanf("%s", infile);
         ifp = fopen(infile, "r");         

         if(ifp == NULL)
           printf("sorry, could not find that file!\n");
         else
         {   
             valid = 1;
             printf("Reading file now.........\n");
         }
    }    
    valid = 0;
    //read in all the words and place them into a BST
    while(!feof(ifp))
    {
        fscanf(ifp, "%s ", newword);
        insert(&root, newword);
    }   

    //ask the user for the file to be spellchecked
    while(!valid)
    {
		printf("what is the name of the file you would like to spellcheck?\n");
		scanf("%s", Tinfile);
		scfp = fopen(Tinfile, "r");
		if(scfp == NULL)
           printf("sorry, could not find that file!\n");
		else
		{   
             valid = 1;
             printf("Reading file now.........\n");
		}
    }    

    printf("The following words were not recognized: \n");    

    for(i = 1; !feof(scfp); i++)
    {
     	fgets(str, linelen, scfp);
		
		token = strtok(str, delims);          

		while( token != NULL ) 
		{
			spellcheck(root, token, i);    
			token = strtok( NULL, delims );
	    }    
    }
	system("PAUSE");
    return 0; 
}

The root variable is not initialized (by 0) before dictionary loading. It has a garbage pointer value so the program are trying to insert nodes to nowhere (memory access violation or another troubles follows)...

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