sudoku checker

#include <cstdlib>
#include <iostream>
using namespace std;
void wczytajSudoku(int grid[] [9]);
bool sprawdzSudoku(int grid[] [9]);
int main()
{
    int sudoku[9][9];

    wczytajSudoku(sudoku);

    if (sprawdzSudoku(sudoku)==true){
        cout << "TAK" << endl;
    }
    else
    {
        cout << "NIE" << endl;
    }
    return 0;
}
void wczytajSudoku(int sudoku[][9])
{
        for(int i=0; i<9; i++) {
            for(int j=0; j<9; j++){
               cin>>sudoku[i][j];
           }
        }
}
bool sprawdzSudoku(int sudoku[][9])
{
    int i,j;
    bool status;
    status = true;

    for (int kol = 0; kol < 9; kol++)
    {
        if (kol !=j && sudoku[i][kol] == sudoku[i][j])
        {
            status = false;
        }
    }
    for (int wiersz = 0; wiersz < 9; wiersz++)
    {
        if (wiersz != i && sudoku[wiersz][j] == sudoku[i][j])
        {
            status = false;
        }
    }
    for (int wiersz = (i / 3) * 3; wiersz < (i / 3) * 3 + 3; wiersz++)
    {
        for (int kl = (j / 3) * 3; kl < (j / 3) * 3 + 3; kl++)
        {
            if (wiersz != i && kl != j && sudoku[wiersz][kl] == sudoku[i][j])
            {
                status = false;
            }
        }
    }
    for (int i = 0; i < 9; i++)
    {
        for (int j = 0; j < 9; j++)
        {
            if (sudoku[i][j] != 0)
            {
                status = false;
            }
        }
    }
    for (int i = 0; i < 9; i++)
    {
        for (int j = 0; j < 9; j++)
        {
            if ((sudoku[i][j] < 0) || (sudoku[i][j] > 9))
            {
                status = false;
            }
        }
    }
    return status;
}