用C在txt文件中查找单词

#include <stdio.h>
#include <string.h>

#define MAX_LINE_LENGTH 1000

void searchWordInFile(const char* filename, const char* word) {
    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("Failed to open file.\n");
        return;
    }

    char line[MAX_LINE_LENGTH];
    int lineNum = 0;
    int matchCount = 0;

    while (fgets(line, sizeof(line), file) != NULL) {
        lineNum++;
        char* token = strtok(line, " ");
        while (token != NULL) {
            if (strstr(token, word) != NULL) {
                printf("Match found at line %d, position %ld: %s\n", lineNum, token - line + 1, token);
                matchCount++;
            }
            token = strtok(NULL, " ");
        }
    }

    if (matchCount == 0) {
        printf("No matches found for the word '%s'.\n", word);
    }

    fclose(file);
}

int main() {
    const char* filename = "example.txt";
    const char* word = "cloud";
    searchWordInFile(filename, word);

    return 0;
}