Question

我想在POST curl中使用动态变量我使用这段代码：

int send(const char*s)
{
  CURL *curl;
  CURLcode res;


  curl_global_init(CURL_GLOBAL_ALL);
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/query.php");
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "q=" + s);
    res = curl_easy_perform(curl);

    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n",
              curl_easy_strerror(res));

    curl_easy_cleanup(curl);
  }
  curl_global_cleanup();
  std::cout << std::endl << "Query sent" << std::endl;
  return 0;
}

我得到了这个错误：

test.cpp:199:57: error: invalid operands of types ‘const char [3]’ and ‘const char*’ to binary ‘operator+’
         curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "q=" + s);
                                                    ~~~~~^~~

Answer 1

你必须自己连接Sub convertSelection() With Selection .Value = Application.Evaluate(.Address & "/86400000") .NumberFormat = "hh:mm:ss.000" End With End Sub和"q="，Cpp中没有运算符s，它将chars数组与指向chars的指针连接起来。使用+创建字符串，将"q="指向的数据添加到此字符串，并调用s以获取c_str()指针作为 curl_easy_setopt 函数的参数：< / p>

const char*

C ++ Curl post动态变量

1 个答案: