C 为什么我的trie正在泄漏数据？

我正在尝试使用trie制作拼写检查器，但是我试图添加到trie的单词似乎没有被输入。漏洞在哪里

我花了好几个小时使用调试器并逐步完成我的代码

主要功能：

/**
 * Implements a spell-checker.
 */

#include <ctype.h>
#include <stdio.h>
#include <sys/resource.h>
#include <sys/time.h>

#include "dictionary.h"
#undef calculate
#undef getrusage

// default dictionary
#define DICTIONARY "dictionaries/large"

// prototype
double calculate(const struct rusage *b, const struct rusage *a);

int main(int argc, char *argv[])
{
    // check for correct number of args
    if (argc != 2 && argc != 3)
    {
        printf("Usage: speller [dictionary] text\n");
        return 1;
    }

    // structs for timing data
    struct rusage before, after;

    // benchmarks
    double time_load = 0.0, time_check = 0.0, time_size = 0.0, time_unload = 0.0;

    // determine dictionary to use
    char* dictionary = (argc == 3) ? argv[1] : DICTIONARY;

    // load dictionary
    getrusage(RUSAGE_SELF, &before);
    bool loaded = load(dictionary);
    getrusage(RUSAGE_SELF, &after);

    // abort if dictionary not loaded
    if (!loaded)
    {
        printf("Could not load %s.\n", dictionary);
        return 1;
    }

    // calculate time to load dictionary
    time_load = calculate(&before, &after);

    // try to open text
    char *text = (argc == 3) ? argv[2] : argv[1];
    FILE *fp = fopen(text, "r");
    if (fp == NULL)
    {
        printf("Could not open %s.\n", text);
        unload();
        return 1;
    }

    // prepare to report misspellings
    printf("\nMISSPELLED WORDS\n\n");

    // prepare to spell-check
    int index = 0, misspellings = 0, words = 0;
    char word[LENGTH+1];

    // spell-check each word in text
    for (int c = fgetc(fp); c != EOF; c = fgetc(fp))
    {
        // allow only alphabetical characters and apostrophes
        if (isalpha(c) || (c == '\'' && index > 0))
        {
            // append character to word
            word[index] = c;
            index++;

            // ignore alphabetical strings too long to be words
            if (index > LENGTH)
            {
                // consume remainder of alphabetical string
                while ((c = fgetc(fp)) != EOF && isalpha(c));

                // prepare for new word
                index = 0;
            }
        }

        // ignore words with numbers (like MS Word can)
        else if (isdigit(c))
        {
            // consume remainder of alphanumeric string
            while ((c = fgetc(fp)) != EOF && isalnum(c));

            // prepare for new word
            index = 0;
        }

        // we must have found a whole word
        else if (index > 0)
        {
            // terminate current word
            word[index] = '\0';

            // update counter
            words++;

            // check word's spelling
            getrusage(RUSAGE_SELF, &before);
            bool misspelled = !check(word);
            getrusage(RUSAGE_SELF, &after);

            // update benchmark
            time_check += calculate(&before, &after);

            // print word if misspelled
            if (misspelled)
            {
                printf("%s\n", word);
                misspellings++;
            }

            // prepare for next word
            index = 0;
        }
    }

    // check whether there was an error
    if (ferror(fp))
    {
        fclose(fp);
        printf("Error reading %s.\n", text);
        unload();
        return 1;
    }

    // close text
    fclose(fp);

    // determine dictionary'size
    getrusage(RUSAGE_SELF, &before);
    unsigned int n = size();
    getrusage(RUSAGE_SELF, &after);

    // calculate time to determine dictionary's size
    time_size = calculate(&before, &after);

    // unload dictionary
    getrusage(RUSAGE_SELF, &before);
    bool unloaded = unload();
    getrusage(RUSAGE_SELF, &after);

    // abort if dictionary not unloaded
    if (!unloaded)
    {
        printf("Could not unload %s.\n", dictionary);
        return 1;
    }

    // calculate time to unload dictionary
    time_unload = calculate(&before, &after);

    // report benchmarks
    printf("\nWORDS MISSPELLED:     %d\n", misspellings);
    printf("WORDS IN DICTIONARY:  %d\n", n);
    printf("WORDS IN TEXT:        %d\n", words);
    printf("TIME IN load:         %.2f\n", time_load);
    printf("TIME IN check:        %.2f\n", time_check);
    printf("TIME IN size:         %.2f\n", time_size);
    printf("TIME IN unload:       %.2f\n", time_unload);
    printf("TIME IN TOTAL:        %.2f\n\n", 
     time_load + time_check + time_size + time_unload);

    // that's all folks
    return 0;
}

/**
 * Returns number of seconds between b and a.
 */
double calculate(const struct rusage *b, const struct rusage *a)
{
    if (b == NULL || a == NULL)
    {
        return 0.0;
    }
    else
    {
        return ((((a->ru_utime.tv_sec * 1000000 + a->ru_utime.tv_usec) -
                 (b->ru_utime.tv_sec * 1000000 + b->ru_utime.tv_usec)) +
                ((a->ru_stime.tv_sec * 1000000 + a->ru_stime.tv_usec) -
                 (b->ru_stime.tv_sec * 1000000 + b->ru_stime.tv_usec)))
                / 1000000.0);
    }
}

---

此代码使用彻底重写的

addWord（）

函数代替

addNode（）

输出文件1：

Nominal dictionary size: 7
aardvark
abelone
assert
assertion
assignation
assigned
assignment

测试文件2：

Mike
Aquarius
delta
assert
zulu
assertion
alpha
aardvark
abelone
culmination
Zulu
kilo
amniocentesis
Oscar
Yankee
cabal
echo
Sierra
duck
Charlie
Quebec
centre
assigned
Papa
foxtrot
uMBRelLA
Romeo
cab
India
Juliet
bravo
amniocentesis
hotel
amniocentesis
Lima
Whisky
cab
culminate
cold
Xray
cab
cabs
assignation
cam
Victor
golf
Tango
November
cinema
cabbie
assignment

输出文件2：

Nominal dictionary size: 56
a
aardvark
abelone
alpha
amniocentesis
aquarius
as
assert
assertion
assign
assignation
assigned
assignment
bravo
cab
cabal
cabbie
cabs
cam
centre
charlie
cinema
cold
culminate
culmination
delta
duck
echo
foxtrot
golf
hotel
i
india
juliet
kilo
lima
mike
november
o
oscar
papa
quebec
romeo
sierra
tango
umbrella
victor
whisky
xray
yankee
zulu

---

注意56的“标称尺寸”太大；输入和输出中有46个不同的单词。

此代码使用彻底重写的

addWord（）

函数代替

addNode（）

输出文件1：

Nominal dictionary size: 7
aardvark
abelone
assert
assertion
assignation
assigned
assignment

测试文件2：

Mike
Aquarius
delta
assert
zulu
assertion
alpha
aardvark
abelone
culmination
Zulu
kilo
amniocentesis
Oscar
Yankee
cabal
echo
Sierra
duck
Charlie
Quebec
centre
assigned
Papa
foxtrot
uMBRelLA
Romeo
cab
India
Juliet
bravo
amniocentesis
hotel
amniocentesis
Lima
Whisky
cab
culminate
cold
Xray
cab
cabs
assignation
cam
Victor
golf
Tango
November
cinema
cabbie
assignment

输出文件2：

Nominal dictionary size: 56
a
aardvark
abelone
alpha
amniocentesis
aquarius
as
assert
assertion
assign
assignation
assigned
assignment
bravo
cab
cabal
cabbie
cabs
cam
centre
charlie
cinema
cold
culminate
culmination
delta
duck
echo
foxtrot
golf
hotel
i
india
juliet
kilo
lima
mike
november
o
oscar
papa
quebec
romeo
sierra
tango
umbrella
victor
whisky
xray
yankee
zulu

注意56的“标称尺寸”太大；在输入和输出中有46个不同的单词。

在（10K必需）中，我注意到“我相当确定，如果您的文件包含'aardvark'和'abelone'，那么您在添加'abelone'时会丢弃（泄漏）关于'aardvark'的信息。”我指的是行

return next->children[word[0]-97]=newNode（word，new_node）；

这完全取代了之前为“aardvark”准备的内容，而您刚刚为“abelone”创建的内容。您必须以完全不同的方式处理问题。97应该写成

'a'

。您可以看一下。我肯定还有其他相关问题。这是针对CS50的吗？在（10K必需）中，我注意到“我相当确定，如果您的文件包含'aardvark'和'abelone'，那么您在添加'abelone'时会丢弃（泄漏）关于'aardvark'的信息。”我指的是

return next->children[word[0]-97]=newNode（word，new\u node）

这完全取代了之前为“aardvark”准备的内容，而你刚刚为“abelone”创建的内容。你必须以完全不同的方式处理事情。那97应该写成

'a'

。你可以看看。我肯定还有其他相关问题。这是为CS50准备的吗？

Mike
Aquarius
delta
assert
zulu
assertion
alpha
aardvark
abelone
culmination
Zulu
kilo
amniocentesis
Oscar
Yankee
cabal
echo
Sierra
duck
Charlie
Quebec
centre
assigned
Papa
foxtrot
uMBRelLA
Romeo
cab
India
Juliet
bravo
amniocentesis
hotel
amniocentesis
Lima
Whisky
cab
culminate
cold
Xray
cab
cabs
assignation
cam
Victor
golf
Tango
November
cinema
cabbie
assignment

Nominal dictionary size: 56
a
aardvark
abelone
alpha
amniocentesis
aquarius
as
assert
assertion
assign
assignation
assigned
assignment
bravo
cab
cabal
cabbie
cabs
cam
centre
charlie
cinema
cold
culminate
culmination
delta
duck
echo
foxtrot
golf
hotel
i
india
juliet
kilo
lima
mike
november
o
oscar
papa
quebec
romeo
sierra
tango
umbrella
victor
whisky
xray
yankee
zulu