Auto clicker

#include <iostream>
#include <sstream>
#define WINVER 0x0601
#include <windows.h>
using namespace std;


const int SCREEN_WIDTH = 1024;
const int SCREEN_HEIGHT = 768;

const int START_WAIT = 2000;
const int CLICK_DELAY = 4;

int main() {

    INPUT input;
    input.type = INPUT_MOUSE;
    input.mi.dwFlags = (MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_MOVE|MOUSEEVENTF_LEFTDOWN|MOUSEEVENTF_LEFTUP);
    input.mi.mouseData = 0;
    input.mi.dwExtraInfo = NULL;
    input.mi.time = 0;

    POINT p;
    string waitstr;
    cout << "To start, enter anything and press enter, and wait " << double(START_WAIT)/1000.0 << " seconds.\n";
    while (1) {
        getline(cin, waitstr);
        Sleep(START_WAIT);
        if (GetCursorPos(&p)) {
            input.mi.dx = p.x * (0xFFFF / SCREEN_WIDTH);
            input.mi.dy = p.y * (0xFFFF / SCREEN_HEIGHT);
        }
        for (int i = 0; i < 2000; ++i) {
            SendInput(1, &input, sizeof(INPUT));
            Sleep(CLICK_DELAY);
        }
    }
}