Fake a mouse click in X,Y of the screen with loop and delay

FakeMouseClick.cpp

#include <iostream>
#include <windows.h>
#include <string>

// LeftClick function
void LeftClick()
{
  INPUT    Input = { 0 };
  // left down 
  Input.type = INPUT_MOUSE;
  Input.mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
  ::SendInput(1, &Input, sizeof(INPUT));

  // left up
  ::ZeroMemory(&Input, sizeof(INPUT));
  Input.type = INPUT_MOUSE;
  Input.mi.dwFlags = MOUSEEVENTF_LEFTUP;
  ::SendInput(1, &Input, sizeof(INPUT));
}

// MouseMove function
void MouseMove(const int x, const int y)
{
  const double fScreenWidth = ::GetSystemMetrics(SM_CXSCREEN) - 1;
  const double fScreenHeight = ::GetSystemMetrics(SM_CYSCREEN) - 1;
  const double fx = x * (65535.0f / fScreenWidth);
  const double fy = y * (65535.0f / fScreenHeight);

  INPUT  Input = { 0 };
  Input.type = INPUT_MOUSE;
  Input.mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE;
  Input.mi.dx = static_cast<LONG>(fx);
  Input.mi.dy = static_cast<LONG>(fy);
  ::SendInput(1, &Input, sizeof(INPUT));
}

int main(int argc, char** argv)
{
  if(argc<4)
  {
    std::cout << "Not enough parameters, use:" << argv[0] << " x y loops delay" << std::endl;
    return 1;
  }
  const int x = argc > 0 ? std::stoi(argv[1]) : 0;
  const int y = argc > 1 ? std::stoi(argv[2]) : 0;
  int loops = argc > 2 ? std::stoi(argv[3]) : -1; //infite loop
  const auto delay = argc > 3 ? std::stoi(argv[4]) : 500; //milliseconds
  while (true) 
  {
    MouseMove(x, y);
    LeftClick();
    Sleep(delay);
    if (loops > 0) loops--;
    if (loops == 0)break;
  }
  return 0;
}