Removing Duplication from Matrix Rows.

What I am trying to do is create a random 9x9 matrix. Ultimately working towards randomly generating a Sudoku puzzle. I am very new to array usage/manipulation so this problem is baffling me.

If you know of Sudoku basically you can't have duplicate numbers in any rows/columns.

My problem is figuring out how to remove duplication of the randomly generated numbers in the rows.

Thus far, I have been able to create a randomly generated 9x9 matrix. That is about as far as I have made it though.

I was wondering, at the very least if someone had an idea on how to remove duplication within each of the rows.

Here is what I have so far.

Code:

#include <iostream>

#include <ctime>

using namespace std;

void matrixOne(int & x, int & y, int matrix[][9]);

int main(void)

{

int matrix[9][9];

int x;

int y;

matrixOne(x,y,matrix);

return 0;

}

void matrixOne(int & x, int & y, int matrix[][9])

{

for(x = 0; x < 9; x++)

{

cout << endl;

for(y=0; y < 9; y++)

{

matrix[x][y] = rand()%9+1;

cout << " " << matrix[x][y];

}

}

cout << endl;

return;

}

My output looks like this :

Code:

6 9 8 5 9 2 4 1 8

3 9 3 8 7 8 6 8 9

4 1 1 7 6 1 5 8 7

6 9 6 3 1 3 1 7 5

9 2 8 4 3 7 3 4 7

3 4 8 3 2 6 6 2 7

4 8 3 4 8 5 5 3 6

7 1 2 5 6 5 5 6 1

6 7 8 6 4 7 4 3 1

Press any key to continue

Any help or suggestions would be greatly appreciated.