我正在尝试学习如何write_data(…)
从类中的函数调用此函数,funmain()
如下面的代码所示。(我知道如果我只列出这两个函数而不把它放在一个类中,这个程序就可以工作)。
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data)
行给了我错误,不会让我调用 write_data(...) 函数。您能否更正我的代码并告诉我如何实现这一点。任何帮助将不胜感激。谢谢。
error C3867: 'go_website::write_data': function call missing argument list; use '&go_website::write_data' to create a pointer to member
//Microsoft Visual Studio 10 in C++
#define CURL_STATICLIB
#include <stdio.h>
#include <curl/curl.h>
#include <curl/types.h>
#include <iostream>
#include <curl/easy.h>
#include <string>
using namespace std;
extern "C" typedef size_t curl_write_callback(void *ptr, size_t size, size_t nmemb, FILE *stream);
class go_website
{
public:
static curl_write_callback write_data;
void funmain()
{
CURL *curl;
FILE *fp;
CURLcode res;
char *url = "http://www.shorturl.com/";
char outfilename[FILENAME_MAX] = "C:\\bbb.txt";
curl = curl_easy_init();
if (curl) {
fp = fopen(outfilename,"wb");
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &write_data);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fp);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
fclose(fp);
}
}};
extern "C" size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
size_t written;
written = fwrite(ptr, size, nmemb, stream);
return written;
}
int main()
{
go_website a;
a.funmain();
return 0;
}