function which generate random points in polygon in c++ and postgresql - c++

Question

installing PostgreSQL database with spatial extension (POST GIS)
create a table points (X,Y,Z) in the database
in C # or C ++ write a program that will connect to the database
please write a function that will generate random points within the Polish borders and save them in the table
points (at least 1000 points, for the Z value, i.e. the height, please assume the range from 0 to 300 meters)
please write a test that will check if the generated points are at least 3 km apart
please create a voivodship table and import the voivodeship borders there
please write a function that will list all generated points for each province
are included in its outline
SHP FILES with country borders and voivodeship borders:
https://gis-support.pl/baza-wiedzy-2/dane-do-pobrania/granice-administracyjne/
Additional task:
please draw all voivodeships and points in the program window
please color the points in different colors for each province
for the generated points, please perform the triangulation operation and show the result in the program window
main
My question is how am I supposed to write this function in qt by plugin QGIS to c++ or how? I don't understand how I am supposed to do this task. Thanks in advance
I added files with Polish borders and voivodship to postgresql and created x,y,z table.
Then I connected to database via pqxx library.
#include <string>
#include <iostream>
#include <pqxx/pqxx>
#include <random>
#include <pqxx/stream_to.hxx>
#include <pqxx/transaction_base.hxx>
#include <pqxx/stream_from.hxx>
int main()
{
std::string connectionString = "host=localhost port=5432 dbname=test user=postgres password =Kotarba2020";
try
{
pqxx::connection connectionObject(connectionString.c_str());
pqxx::work worker(connectionObject);
pqxx::result response = worker.exec("SELECT * FROM Wojewodztwa");
for (size_t i = 0; i < response.size(); i++)
{
std::cout << "Id: " << response[i][0] << " X: " << response[i][1] << " Y: " << response[i][2] << " Z: " << response[i][3] << std::endl;
}
}
catch (const std::exception& e)
{
std::cerr << e.what() << std::endl;
}
system("pause");
}