//******************************************************************
// Chessboard program
// This program prints a chessboard pattern that is built up from
// basic strings of white and black characters.
//******************************************************************
#include <iostream>
#include <string>
using namespace std;

const string BLACK = "%%%%%%%%";  // Define a line of a black square
const string WHITE = "        ";  // Define a line of a white square

int main ()
{
  string whiteRow;          // A row beginning with a white square
  string blackRow;          // A row beginning with a black square

  // Create a white-black row by concatenating the basic strings
  whiteRow = WHITE + BLACK + WHITE + BLACK +
                 WHITE + BLACK + WHITE + BLACK;
  // Create a black-white row by concatenating the basic strings
  blackRow = BLACK + WHITE + BLACK + WHITE +
                 BLACK + WHITE + BLACK + WHITE;

  // Print five white-black rows
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;

  // Print five black-white rows
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;

  // Print five white-black rows
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  // Print five black-white rows
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  // Print five white-black rows
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;

  // Print five black-white rows
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;

  // Print five white-black rows
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;
  cout << whiteRow << endl;

  // Print five black-white rows
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;
  cout << blackRow << endl;

//  system("PAUSE"); //if using Dev C++
  return 0;
}