Implementing GEO Fence Function for Drones in C++

#include <iostream>
#include <cstdlib>
#include <string>

#define MAX_LATITUDE 90  // Maximum allowed latitude coordinate
#define MIN_LATITUDE -90 // Minimum allowed latitude coordinate
#define MAX_LONGITUDE 180 // Maximum allowed longitude coordinate
#define MIN_LONGITUDE -180 // Minimum allowed longitude coordinate

struct GPSCoordinate {
  double latitude;
  double longitude;
};

// Returns true if the GPS coordinate is within the defined fence boundaries, false otherwise
bool withinFenceBoundaries(GPSCoordinate coord) {
  if (coord.latitude > MAX_LATITUDE || coord.latitude < MIN_LATITUDE ||
      coord.longitude > MAX_LONGITUDE || coord.longitude < MIN_LONGITUDE) {
    return false;
  }
  return true;
}

int main() {
  GPSCoordinate currentLocation;

  // Get current GPS coordinates from drone
  // (assume this is done using some other function or hardware)
  currentLocation.latitude = 50.0;
  currentLocation.longitude = 50.0;

  if (withinFenceBoundaries(currentLocation)) {
    std::cout << "Drone is within fence boundaries. Continuing normal flight operations." << std::endl;
  } else {
    std::cout << "Drone is outside of fence boundaries. Initiating emergency landing procedures." << std::endl;
  }

  return 0;
}