帮我用libcurl写一个带证书访问https://www.baidu.com的c++的get和post封装访问的例子

好的，以下是一个简单的使用libcurl进行HTTPS GET和POST请求的C++代码示例：

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

// HTTPS GET请求的回调函数
size_t curl_callback_get(void* contents, size_t size, size_t nmemb, void* userp) {
    ((std::string*)userp)->append((char*)contents, size * nmemb);
    return size * nmemb;
}

// HTTPS POST请求的回调函数
size_t curl_callback_post(void* contents, size_t size, size_t nmemb, void* userp) {
    ((std::string*)userp)->append((char*)contents, size * nmemb);
    return size * nmemb;
}

// HTTPS GET请求封装函数
std::string https_get(const std::string& url, const std::string& cert_path) {
    std::string response;
    CURL* curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_CAINFO, cert_path.c_str());
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback_get);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        }
        curl_easy_cleanup(curl);
    }
    return response;
}

// HTTPS POST请求封装函数
std::string https_post(const std::string& url, const std::string& cert_path, const std::string& post_fields) {
    std::string response;
    CURL* curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_CAINFO, cert_path.c_str());
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
        curl_easy_setopt(curl, CURLOPT_POST, 1L);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_fields.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback_post);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        }
        curl_easy_cleanup(curl);
    }
    return response;
}

int main() {
    // HTTPS GET请求示例
    std::string url = "https://www.baidu.com/";
    std::string cert_path = "/path/to/your/certificate.pem";
    std::string response = https_get(url, cert_path);
    std::cout << "Response from " << url << ":\n" << response << std::endl;

    // HTTPS POST请求示例
    url = "https://www.example.com/";
    cert_path = "/path/to/your/certificate.pem";
    std::string post_fields = "foo=bar&baz=qux";
    response = https_post(url, cert_path, post_fields);
    std::cout << "Response from " << url << ":\n" << response << std::endl;

    return 0;
}

需要注意的是，要使用HTTPS协议，需要提供证书文件路径，并开启SSL验证选项。以上代码中使用了两个回调函数`curl_callback_get`和`curl_callback_post`，分别用于处理HTTPS GET和POST请求的响应结果。

另外，需要在编译时链接libcurl库，例如使用以下命令编译：

g++ -o main main.cpp -lcurl