在C中的构造字符串中查找特定单词

Question

任何人都可以帮助我吗？我是编程新手。如何使str和str2比较？ （如果可以，带代码）。或任何可以在CURLcode

中找到特定单词的代码

int main(void) {
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "mabinogi.nexon.net");
        /* example.com is redirected, so we tell libcurl to follow redirection*/ 
        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);

        /* Perform the request, res will get the return code */ 
        res = curl_easy_perform(curl);
        /* Check for errors */ 
        if (res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n",
                curl_easy_strerror(res));
        }
        const char *str = curl_easy_strerror(res);
        char *str2 = "nogi";
        char *ff = strstr(str,str2); /*how to make this compareable?*/
        if (ff) {
            printf("word found!");
        }
        printf(*str);

        /* always cleanup */ 
        curl_easy_cleanup(curl);
    }
    return 0;
}