使用C中的libcurl保存文件

#include <stdio.h>
#include <curl/curl.h>

size_t write_data(void* ptr, size_t size, size_t nmemb, FILE* stream) {
    size_t written = fwrite(ptr, size, nmemb, stream);
    return written;
}

int main() {
    CURL* curl;
    FILE* file;
    CURLcode res;

    curl_global_init(CURL_GLOBAL_ALL);
    curl = curl_easy_init();
    if (curl) {
        file = fopen("保存路径/文件名", "wb");
        if (file) {
            curl_easy_setopt(curl, CURLOPT_URL, "文件的URL");
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, file);
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
            res = curl_easy_perform(curl);
            if (res != CURLE_OK) {
                fprintf(stderr, "下载失败: %s\n", curl_easy_strerror(res));
            }
            fclose(file);
        }
        curl_easy_cleanup(curl);
    }
    curl_global_cleanup();

    return 0;
}