c - 拼写检查程序问题

Question

我正在努力完成我的拼写检查项目，但遇到了一些问题。我正在尝试使用 strlen 和 strcmp 来比较文章和字典中的单词，但编译器告诉我标识符“strlen”和“strcmp "是未定义的。我不确定在这里做什么。此外，当我将 char(article) 加载到 int ArticleLength 时，它告诉我不能将 int 与 char article 一起使用。我是一个初学者，需要一些帮助。到目前为止，这是我的代码。

#include <stdio.h> // provides declarations for printf and putchar
#include <stdint.h> // provides declarations for int32_t uint32_t and the other (new) standard C type
/* You must write this function (spellCheck). Do not change the way the function is declared (i.e., it has
 * exactly two parameters, each parameter is a standard (mundane) C string (see SpellCheck.pdf).
 * You are expected to use reasonable programming style. I *insist* that you indent 
 * reasonably and consistently in your code. I strongly encourage you to avoid big functions
 * (while there are always exceptions, a good rule of thumb is about 15 lines in a function).
 * So, plan on implementing spellCheck by writing two or three other "support functions" that
 * help make the actual spell checking easier for you.
 * There are no explicit restictions on using functions from the C standard library. However,
 * for this project you should avoid using functionality from the C++ standard libary. You will
 * almost certainly find it easiest to just write everything you need from scratch!
 */
void spellCheck(char article[], char dictionary[]){
int OneLetter(char c);
void MakeLower(char article[]);
void KillPunct(char article[]);
void LowerDictionary(char dictionary[]);
int ArticleLength(char article[]);
void ArticleNextWord(char article[], char ArticleWord[], int ArticleLength, char dictionary[]);
char ArticleWord[50];
char DictionaryWord[50];
//int ArticleLength = ArticleLength(article);
KillPunct(article);
MakeLower(article);
LowerDictionary(dictionary);
ArticleNextWord(article, ArticleWord, ArticleLength, dictionary);
int strncmp(char *ArticleWord, char *DictionaryWord, int n);
int main(void); {
    FILE *Dictionary;
    FILE *Article;
    int words_read;
    char* p;

    Dictionary = fopen("dictionary.txt", "r");
    if (Dictionary == 0) {
        printf("The Dictionary is Empty");
        return;
    }
    Article = fopen("article.txt", "r");
    if (Article == 0) {
        printf("The Article Has No Words");
        return;
    }
    p = dictionary;
    p = fgets(p, 100, Dictionary);
    while (p != 0) {
        while (*p != '\0') {
            p += 1;
        }
        p = fgets(p, 100, Dictionary);
    }
    p = article;
    words_read = fread(p, 1, 1000, Article);
    p += words_read;
    while (words_read != 0) {
        words_read = fread(p, 1, 1000, Article);
        p += words_read;
        }
    *p = 0;
    }
spellCheck(article, dictionary);


int ArticlePosition = 0;
int DictionaryPosition = 0;

void DictionaryNextWord(char dictionary[], char DictionaryWord[]) {
    int i;
    for (i = 0; dictionary[DictionaryPosition] != '\n'; i += 1) {
        DictionaryWord[i] = dictionary[DictionaryPosition];
        DictionaryPosition += 1;
    }
}
int OneLetter(char c){
    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
        return 1;
    return 0;
}

void KillPunct(char article[]) {
    int i, j = 0;
    for (i = 0; article[i] != 0; i += 1) {
        if (OneLetter(article[i])){
            article[j] = article[i];
            j += 1;
        }
        else if (!OneLetter(article[i])){
            article[j] = ' ';
            j += 1;
        }
    }
}

void MakeLower(char article[]) {
    int i = 0;
    for (i += 1; article[i] != 0; i += 1) {
        if (article[i] >= 'A' && article[i] <= 'Z')
            article[i] = article[i] + 32;
    }
}

void LowerDictionary(char dictionary[]){
    int i = 0;
    for (i; dictionary[i] != 0; i += 1){
        if (dictionary[i] >= 'A' && dictionary[i] <= 'Z'){
            dictionary[i] = dictionary[i] + 32;
        }
    }
}

int ArticleLength(char article[]){
    int count = 0;
    while (article[count] != 0)
        count += 1;
    return count;
}

void ArticleNextWord(char article[], char ArticleWord[], int ArticleLength, char DictionaryWord[], char dictionary[]){
    int j, i;
check:
    int counter = strlen(ArticleWord);
    while (!OneLetter(article[ArticlePosition])){
        if (article[ArticlePosition] == 0){
            return;
        }
        ArticlePosition += 1;
    }
    for (j = 0; article[ArticlePosition] != ' ' || ArticlePosition == ArticleLength; j += 1){
        ArticleWord[j] = article[ArticlePosition];
        ArticlePosition += 1;
    }
    if (counter < 2){
        goto check;
    }
    ArticleWord[j + 1] = 0;
    while (!strcmp(ArticleWord, DictionaryWord, strlen(ArticleWord))){
        DictionaryNextWord(dictionary, DictionaryWord);
    }
    if (strcmp(ArticleWord, DictionaryWord, strlen(ArticleWord)))
        return;
    printf(ArticleWord);
}

Answer 1

您需要包含定义 strlen 的 header 和 strcmp

#include <string.h>

后来:对您的问题的编辑已删除其他包含内容。您还需要 #include <stdio.h>