QS with pointers

#include "pch.h"
#include <iostream>
#include <cstdlib>
#include "time.h"

using namespace std;

// int arrSize = 10;
// int arr[arrSize];


int deli(int *arr[], int dno, int vrh);
void izpisiZaporedje(int *arr[], int velikost);
void hitroUredi(int *arr[], int dno, int vrh);
void generirajNakljucno(int *arr[], int velikost);
void generirajNarascajoce(int *arr[], int velikost);
void generirajPadajoce(int *arr[], int velikost);
void preveri(int *arr[], int velikost);

int main()
{
	clock_t start, finish;
	double duration;
	srand(time(NULL));

	int size = 0;

	cout << "Vnesi velikost polja: " << endl;
	cin >> size;

	int *arrStevil = new int[size];

	while (true) {

	int izbira;
	cout <<
		"Hitro uredi - izbira\n\n" <<
		"1 Generiraj nakljucno zaporedje\n" <<
		"2 Generiraj urejeno narascajoce zaporedje\n" <<
		"3 Generiraj urejeno padajoče zaporedje\n" <<
		"4 Izpis zaporedja\n" <<
		"5 Uredi\n" <<
		"6 Konec\n" <<
		"Vasa izbira: ";
	cin >> izbira;

	switch (izbira) {
		case 1:
			generirajNakljucno(&arrStevil, size);
			break;
		case 2:
			generirajNarascajoce(&arrStevil, size);
			break;
		case 3:
			generirajPadajoce(&arrStevil, size);
			break;
		case 4:
			izpisiZaporedje(&arrStevil, size);
			break;
		case 5:
			start = clock();
			hitroUredi(&arrStevil, 0, size - 1);
			finish = clock();
			duration = (double)(finish - start);
			cout << "Cas izvajanja: " << duration << endl;
			preveri(&arrStevil, size);
			break;
		case 6:
			return 1;
		default:
			cout << "Vpisi ponovno: ";
		}
	}

}

void preveri(int *arr[], int velikost) {
	bool pravilnoUrejeno = true;
	for (int i = 0; i < velikost - 1; i++) {
		if (arr[i + 1] < arr[i]) {
			cout << arr[i + 1] << " " << arr[i] << endl;
			pravilnoUrejeno = false;
		}
	}
	if (pravilnoUrejeno) cout << "Zaporedje je pravilno urejeno" << endl;
	else cout << "Zaporedje ni pravilno urejeno" << endl;
}


void generirajNakljucno(int *arr[], int velikost) {
	for (int i = 0; i < velikost; i++)
		*arr[i] = (rand() % 50000);
}

void generirajNarascajoce(int *arr[], int velikost) {
	for (int i = 0; i < velikost; i++)
		*arr[i] = i;
}

void generirajPadajoce(int *arr[], int velikost) {
	for (int i = velikost; i >= 0; i--)
		*arr[i] = velikost - i;
}


void hitroUredi(int *arr[], int dno, int vrh) {
	if (dno < vrh) {
		int j = deli(arr, dno, vrh);
		hitroUredi(arr, dno, j - 1);
		hitroUredi(arr, j + 1, vrh);
	}
}

int deli(int *arr[], int dno, int vrh) {

	int m = (dno + vrh) / 2;

	int tmpA = *arr[dno];
	*arr[dno] = *arr[m];
	*arr[m] = tmpA;

	int pe = *arr[dno];
	int levi = dno + 1;
	int desni = vrh;

	while (true) {

		while (*arr[levi] < pe && levi <= vrh) levi++;
		while (*arr[desni] > pe && desni >= dno) desni--;

		if (desni <= levi) break;
		else {
			int tmpB = *arr[levi];
			*arr[levi] = *arr[desni];
			*arr[desni] = tmpB;
			levi++;
			desni--;
		}
	}

	int tmpC = *arr[dno];
	*arr[dno] = *arr[desni];
	*arr[desni] = tmpC;

	return desni;
}

void izpisiZaporedje(int *arr[], int velikost) {
	for (int i = 0; i < velikost; i++) {
		cout << arr[i] << " ";
	}
	cout << endl;
}