下面的代码只是输出第一页的内容请修改代码让输出所有页的内容：#include iostream#include fstream#include string#include curlcurlh 回调函数用于处理libcurl接收到的数据size_t WriteCallbackvoid contents size_t size size_t nmemb stdstring output si

要输出所有页的内容，需要对循环部分进行修改。以下是修改后的代码：

#include <iostream>
#include <fstream>
#include <string>
#include <curl/curl.h>

// 回调函数，用于处理libcurl接收到的数据
size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* output) {
    size_t total_size = size * nmemb;
    output->append((char*)contents, total_size);
    return total_size;
}

int main() {
    // 输入基因名字
    std::string gene_name;
    std::cout << "请输入基因名字：";
    std::cin >> gene_name;

    // 构建搜索URL
    std::string search_url = "https://www.ncbi.nlm.nih.gov/bioproject/?term=" + gene_name;

    // 初始化libcurl
    curl_global_init(CURL_GLOBAL_ALL);
    CURL* curl = curl_easy_init();
    if (curl) {
        // 设置libcurl选项
        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);

        // 创建回调函数的输出字符串
        std::string response;

        // 声明当前页和总页数的变量
        size_t current_page = 1;
        size_t total_pages = 1;

        // 循环执行HTTP请求直到获取所有页的结果
        while (true) {
            // 设置回调函数
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);

            // 发送请求并检查是否成功
            curl_easy_setopt(curl, CURLOPT_URL, (search_url + "&page=" + std::to_string(current_page)).c_str());
            CURLcode res = curl_easy_perform(curl);

            if (res != CURLE_OK) {
                std::cerr << "请求失败：" << curl_easy_strerror(res) << std::endl;
                return 1;
            }

            // 在response中查找总页数
            if (current_page == 1) {
                size_t page_start_pos = response.find("Page 1 of ");
                if (page_start_pos != std::string::npos) {
                    size_t page_end_pos = response.find("</div>", page_start_pos);
                    std::string page_info = response.substr(page_start_pos, page_end_pos - page_start_pos);
                    total_pages = std::stoi(page_info.substr(10));
                }
            }

            // 在response中查找Accession号
            size_t start_pos = 0;
            while ((start_pos = response.find("Accession:", start_pos)) != std::string::npos) {
                size_t accession_start = start_pos + 10;
                size_t accession_end = response.find("</dd>", accession_start);
                std::string accession_number = response.substr(accession_start, accession_end - accession_start);
                std::ofstream output_file("accession_numbers.txt", std::ios::app);
                if (output_file.is_open()) {
                    output_file << accession_number << std::endl;
                    output_file.close();
                } else {
                    std::cerr << "无法打开文件" << std::endl;
                    return 1;
                }
                start_pos = accession_end;
            }

            // 当前页数加1
            current_page++;

            // 重置response字符串
            response = "";

            // 如果当前页数超过总页数，则跳出循环
            if (current_page > total_pages) {
                break;
            }
        }

        // 关闭libcurl
        curl_easy_cleanup(curl);

        std::cout << "Accession号已写入accession_numbers.txt" << std::endl;
    } else {
        std::cerr << "无法初始化libcurl" << std::endl;
        return 1;
    }

    // 清理libcurl
    curl_global_cleanup();

    return 0;
}

这样修改后的代码将会循环执行HTTP请求，直到获取所有页的结果。