Thread: Random Checkerboard Help

have a C++ book I am currently looking at and trying to make some modifications...

Here is the code I modified from C++ text I have:
Have a checkerboard of random 0s and 1s and check to see if of the same number is found vertically, horizontally or diagonals...

diagonals apparently do not work..
Runs:

Code:

11101001
01100101
11110110
10000011
11111111
11001010
01001100
11001001
All 1's on row 4
No same numbers on the same column
No same numbers on the same diagonal
No same numbers on the same subdiagonal

11011011
00000001
00000011
11110001
11100111
10000001
10110101
01001101
All 1's on column 7
All 1's on sub-diagonal
No same numbers on the same row
No same numbers on the same diagonal

The above is wrong...

Here is the code...I cant see the problem...thanks for help

Code:

#include <iostream>
#include <ctime> // for time function
#include <cstdlib> // for rand and srand functions
using namespace std;

int main()
{
  srand(time(0));
  int board[8][8];

  bool isSameOnARow = false, isSameOnAColumn = false,
       isSameOnADiagonal = false, isSameOnASubdiagonal = false;

  for (int i = 0; i < 8; i++)
  {
    for (int j = 0; j < 8; j++)
    {
      board[i] [j] = rand() % 2;
      cout << board[i] [j];
    }

    cout << endl;
  }

  // Check rows
  for (int i = 0; i < 8; i++)
  {
    bool same = true;
    for (int j = 1; j < 8; j++)
    {
      if (board[i][0] != board[i] [j])
      {
        same = false; break;
      }
    }

    if (same) {
      cout << "All " << board[i] [0] << "'s on row " << i << endl;
      isSameOnARow = true;
    }
  }

  // Check columns
  for (int j = 0; j < 8; j++)
  {
    bool same = true;
    for (int i = 1; i < 8; i++)
    {
      if (board[0] [j] != board[i] [j])
      {
        same = false; break;
      }

    }
    if (same) {
      cout << "All " << board[0] [j] << "'s on column " << j << endl;
      isSameOnAColumn = true;
    }
  }

  // Check major diagonal
  bool same = true;
  for (int i = 1; i < 8; i++)
  {
    if (board[0] [0] == board[i] [i])
    {
      same = false; break;
    }
  }

  if (same) {
    cout << "All " << board[0] [0] << "'s on major diagonal" << endl;
    isSameOnADiagonal = true;
  }

  // Check subdiagonal
  same = true;
  for (int i = 1; i < 8; i++)
  {
    if (board[0] [7] == board[i] [7 - i])
    {
      same = false; break;
    }
  }

  if (same) {
    cout << "All " << board[0][0] << "'s on sub-diagonal" << endl;
    isSameOnASubdiagonal = true;
  }

  if (!isSameOnARow) {
    cout << "No same numbers on the same row" << endl;
  }

  if (!isSameOnAColumn) {
    cout << "No same numbers on the same column" << endl;
  }

  if (!isSameOnADiagonal) {
    cout << "No same numbers on the same diagonal" << endl;
  }

  if (!isSameOnASubdiagonal) {
    cout << "No same numbers on the same subdiagonal" << endl;
  }
/* Scaffolding code for testing purposes */
cin.ignore(256, '\n');
cout << "Press ENTER to continue..." << endl;
cin.get();
/* End Scaffolding */ 
  return 0;
}