Trie tree Template

#include <stdio.h>#include <stdlib.h>#include <string.h>#define MAX 27typedef struct node{    int v;    struct node *next[MAX];}Trie;Trie *root;void creatTrie(char *str){    int i, id, j;    Trie *p = root, *q;    int len = strlen(str);    for( i=0; i<len; i++)    {        id = str[i] - ‘a‘;        if(p->next[id] == NULL){            q = (Trie *)malloc(sizeof(Trie));            q->v = 0;            for( j=0; j<MAX; j++)                q->next[j] = NULL;            p->next[id] = q;        }        p = p->next[id];        p->v++;    }}void findTrie(char *str){    int i, id;    int len = strlen(str);    Trie *p = root;    for( i=0; i<len; i++)    {        id = str[i] - ‘a‘;        p = p->next[id];        if(p == NULL)            return ;        if(p->v > 1)            printf("%c",str[i]);        if(p->v == 1){            printf("%c",str[i]);            return ;        }    }}void delTrie(Trie *T){    int i;    if(T == NULL)        return ;    for( i=0; i<MAX; i++)        if(T->next[i] != NULL)            delTrie(T->next[i]);    free(T);}int main(void){    char str[1003][23];    int n = 0, i;    root = (Trie *)malloc(sizeof(Trie));    root->v = 0;    for( i=0; i<MAX; i++)        root->next[i] = NULL;    while(scanf("%s",str[n])!=EOF){        creatTrie(str[n++]);    }    for( i=0; i<n; i++)    {        printf("%s ",str[i]);        findTrie(str[i]);        printf("\n");    }    delTrie(root);    return 0;}