Alg_trie count word frequency
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define TREE_WIDTH 256
#define WORDLENMAX 128
// count Word frequency
struct trie_node_st {
int count;
struct trie_node_st *next[TREE_WIDTH];
};
static struct trie_node_st root={0, {NULL}};
static char *spaces=" \t\n/.\"\'()";
static int
insert(const char *word)
{
int i;
struct trie_node_st *curr, *newnode;
if (word[0]=='\0') {
return 0;
}
curr = &root;
for (i=0; ; ++i) {
if (curr->next[ word[i] ] == NULL) {
newnode=(struct trie_node_st*)malloc(sizeof(struct trie_node_st));
memset(newnode, 0, sizeof(struct trie_node_st));
curr->next[ word[i] ] = newnode;
}
if (word[i] == '\0') {
break;
}
curr = curr->next[ word[i] ];
}
curr->count ++;
return 0;
}
static void
printword(const char *str, int n)
{
printf("%s\t%d\n", str, n);
}
static int
do_travel(struct trie_node_st *rootp)
{
static char worddump[WORDLENMAX+1];
static int pos=0;
int i;
if (rootp == NULL) {
return 0;
}
if (rootp->count) {
worddump[pos]='\0';
printword(worddump, rootp->count);
}
for (i=0;i<TREE_WIDTH;++i) {
worddump[pos++]=i;
do_travel(rootp->next[i]);
pos--;
}
return 0;
}
int
main(void)
{
char linebuf[200];
size_t bufsize=0;
int ret;
while (1) {
if (!fgets(linebuf, 200-1, stdin)) {
break;
}
// while (1)
{
char *word = linebuf;
if (word==NULL) {
break;
}
if (word[0]=='\0') {
continue;
}
insert(word);
}
}
/* free(linebuf); */
do_travel(&root);
exit(0);
}
#include <stdlib.h>
#include <string.h>
#define TREE_WIDTH 256
#define WORDLENMAX 128
// count Word frequency
struct trie_node_st {
int count;
struct trie_node_st *next[TREE_WIDTH];
};
static struct trie_node_st root={0, {NULL}};
static char *spaces=" \t\n/.\"\'()";
static int
insert(const char *word)
{
int i;
struct trie_node_st *curr, *newnode;
if (word[0]=='\0') {
return 0;
}
curr = &root;
for (i=0; ; ++i) {
if (curr->next[ word[i] ] == NULL) {
newnode=(struct trie_node_st*)malloc(sizeof(struct trie_node_st));
memset(newnode, 0, sizeof(struct trie_node_st));
curr->next[ word[i] ] = newnode;
}
if (word[i] == '\0') {
break;
}
curr = curr->next[ word[i] ];
}
curr->count ++;
return 0;
}
static void
printword(const char *str, int n)
{
printf("%s\t%d\n", str, n);
}
static int
do_travel(struct trie_node_st *rootp)
{
static char worddump[WORDLENMAX+1];
static int pos=0;
int i;
if (rootp == NULL) {
return 0;
}
if (rootp->count) {
worddump[pos]='\0';
printword(worddump, rootp->count);
}
for (i=0;i<TREE_WIDTH;++i) {
worddump[pos++]=i;
do_travel(rootp->next[i]);
pos--;
}
return 0;
}
int
main(void)
{
char linebuf[200];
size_t bufsize=0;
int ret;
while (1) {
if (!fgets(linebuf, 200-1, stdin)) {
break;
}
// while (1)
{
char *word = linebuf;
if (word==NULL) {
break;
}
if (word[0]=='\0') {
continue;
}
insert(word);
}
}
/* free(linebuf); */
do_travel(&root);
exit(0);
}