使用CURL库下载文件

#include <curl/curl.h>
#pragma comment( lib, "libcurl.lib" )

size_t write_data(char *buffer,size_t size, size_t nitems,void *outstream)

{

　　int written = fwrite(buffer, size, nitems, (FILE*)outstream);

　　return written;

}

int main(int argc, char* argv[])

{

　　CURL* pCurl = curl_easy_init();

　　FILE* pFile = fopen( "E:/test.txt", "wb" );

　　curl_easy_setopt(pCurl, CURLOPT_WRITEDATA, (void*)pFile );

　　//设置回调函数

　　curl_easy_setopt(pCurl, CURLOPT_WRITEFUNCTION, write_data);

　　curl_easy_setopt(pCurl, CURLOPT_URL, "www.google.com.hk");

　　curl_easy_perform(pCurl);

　　fclose(pFile);

　　curl_easy_cleanup( pCurl );

　　return 0;

}