Sudoku Game with C++ - day 2

I finally finished making 3 by 3 matrix which have 1 ~ 9 numbers in it.

These are results. There is no repeated number but 1 ~ 9 numbers with random arrangement

And this is the code

////////////////////////////////////////////////////////////////////////////////////

#include <iostream>
#include <random>

using namespace std;

int num[9] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
int arrNum[9];

int arr[3][3];

void createSudoku();
void printSudoku();
void bubbleSortArr();
void swap(double* a, double* b);
void printArrNum();
bool IsSame();

void main()
{
 createSudoku();
 printSudoku();
}

void createSudoku()
{
 while (1)
 {
  random_device rd;
  mt19937_64 rng(rd());

  uniform_int_distribution<__int64> dist1(1, 9);
  int k = 0;

  for (int i = 0; i < 3; i++)
  {
   for (int j = 0; j < 3; j++)
   {
    arr[i][j] = dist1(rng);
    arrNum[k] = arr[i][j];
    k++;
   }
  }
  bubbleSortArr();
  if (IsSame())
  {
   break;
  }
 }
}

void printSudoku()
{
 for (int i = 0; i < 3; i++)
 {
  for (int j = 0; j < 3; j++)
  {
   cout << arr[i][j] << " ";
  }
  cout << endl;
 }
}

void printArrNum()
{
 for (int i = 0; i < 9; i++)
 {
  cout << arrNum[i] << " ";
 }
}

void bubbleSortArr()
{
 for (int j = 0; j < 9; j++)
 {
  for (int k = 0; k < 9 - j - 1; k++)
  {
   if (arrNum[k] > arrNum[k + 1])
    swap(arrNum[k], arrNum[k + 1]);
  }
 }
}

void swap(double* a, double* b)
{
 double * temp;
 temp = a;
 a = b;
 b = temp;
}

//day1
bool IsSame()
{
 bool same = true;

  for (int i = 0; i < sizeof(num) / sizeof(int); i++)
  {
   if (num[i] != arrNum[i])
    same = false;
  } 

 return same;
}

////////////////////////////////////////////////////////////////////////////////////

Now, I will extend this to 9 by 9 Sudoku matrix