int scan(int matrix[9][9], int r)
{
    int num = 0;
    for (int i = 0;i < 9;i++)
    {
        if (matrix[r][i] != 0)num++;
    }
    return num;
}
void ran0(int matrix[9][9],int n)
{
    int count = 0;
    int r, j, num;
    while (count < 9)
    {
        do
        {
            r = rand() % 3;
            num = scan(matrix, r + n);
        } while (num >= 3);
        do
        {
            j = rand() % 9;
        } while (matrix[r+n][j] != 0);
        matrix[r + n][j] = ++count;
    }
}
void ran(int matrix[9][9])
{
    ran0(matrix, 0);
    ran0(matrix, 3);
    ran0(matrix, 6);
}
int main()
{
    srand(time(NULL));
    int matrix[9][9] = { 0 };
    ran(matrix);
    mat(matrix);
    system("pause");
    return 0;
}