POST запрос на php скрипт

#include <winsock2.h>
#include <iostream>
#include <string.h>
 
#pragma comment(lib, "Ws2_32.lib")
 
std::string post(char * hosting)
{
    WSADATA wData;
    struct sockaddr_in addr;
    SOCKET sock;
    
    if(WSAStartup(MAKEWORD(1,1),&wData)!=0) {return 0;}
    sock = socket(AF_INET,SOCK_STREAM,0);
    
    if(sock==-1) {return 0;}
    
    addr.sin_family = AF_INET;
    addr.sin_port = htons(80);
    hostent * host = gethostbyname(hosting);
    addr.sin_addr = *(struct in_addr *) host->h_addr_list[0];
    
    connect(sock,(struct sockaddr *)&addr,sizeof(addr));
 
    char request[512] = "POST /index.php HTTP/1.1\r\n";
    strcat(request, "Host: localhost\r\n");
    strcat(request, "Connection: keep-alive\r\n");
    strcat(request, "Content-Type: multipart/form-data; boundary=--------------------------3124823263672\r\n");
    strcat(request, "Content-Lenght: 196\r\n\r\n"); 
    strcat(request, "----------------------------3124823263672\r\n");
    strcat(request, "Content-Disposition: form-data; name=\"filename\"; filename=\"text2.txt\"\r\n");
    strcat(request, "Content-Type: text/plain\r\n\r\n");
    strcat(request, "text");
    strcat(request, "\r\n----------------------------3124823263672--\r\n");
 
    char answer [2048] = "";
    
    send(sock,&request[0],sizeof(request),0);
    
    recv(sock,&answer[0],sizeof(answer),0);
    
    std::string AnswerStr = &answer[0];
        
    shutdown(sock,2);
    closesocket(sock);
    WSACleanup();
 
    return AnswerStr;
}
 
int main()
{ 
    setlocale(LC_ALL, "RUS");
    printf(post("localhost").c_str());
    printf("\n");
    
    system("pause");
    return 0;
}