C语言用二叉树统计一个源文件中每个单词的次数

由于出现的单词不确定，所以用二叉树实现:

[cpp]
//TreeNode.h

typedef struct _TreeNode
{
     int count; //出现的次数
     char* word;//单词本省
     struct _TreeNode* left;
     struct _TreeNode* right;

}TreeNode;

//给TreeNode分配内存
TreeNode* talloc(void)
{
   return (TreeNode*)malloc(sizeof(TreeNode));
}

//打印tree
void tprint(TreeNode* root)
{
     //打印left->self->right
     if(root!=NULL)
     {
         tprint(root->left);
         printf("%4d %s\n",root->count,root->word);
         tprint(root->right);
     }
}

//把单词添加节点的合适位置
TreeNode* addNode(TreeNode* node,const char* word)
{
    int con;
    TreeNode* tmp;
    if(node==NULL)
    {
        node = talloc();
        node->count=1;
        node->word=strdup(word);
        node->left=node->right=NULL;
    }else if((con=strcmp(word,node->word))<0)
    {
       tmp = addNode(node->left,word);
       node->left=tmp;
    }else if(con>0)
    {
       tmp = addNode(node->right,word);
       node->right=tmp;
    }else{
       node->count++;
    }
    return node;
}
/**
从指定的流中读取单词
*/
int getWord(char* ch,size_t n,FILE* f)
{
   int c;
   char* p = ch;
   while(isspace(c=fgetc(f)))
         ;
if(c!=EOF)
       *p++=c;
if(!isalpha(c))
{
     *p='\0';
     return c;
}
for(;--n>0;p++)
{
     if(!isalpha(*p=fgetc(f)))
     {
        ungetc(*p,f);
        break;
     }
}
   *p='\0';
   return c;

}
//是否tree占用的内存
void treeFree(TreeNode* root)
{
   if(root!=NULL)
   {
      treeFree(root->left);
      free(root->word); //释放节点的word占用的内存
      free(root);       //是否节点占用的内存
      treeFree(root->right);
   }
}
//Test.c
#include <stdio.h>
#include <stdlib.h>
#include "TreeNode.h"

#define MAX 100
int main(int argc, char *argv[])
{
FILE* f;
char w[MAX]={0};
char* fname="TreeNode.h";
if((f=fopen(fname,"r"))!=NULL)
{
    TreeNode* root = NULL;
    while((getWord(w,MAX,f)!=EOF))
     {
          if(isalpha(w[0]))
              root = addNode(root,w);
     }
    tprint(root);
    treeFree(root);
    fclose(f);
}else{
         printf("open %s error\n",fname);
}
getchar();
return 0;
}

补充：软件开发 , C++ ,