sudoku.cpp

#ifndef Bismillah
#include <cstdlib>
#include <iostream>
using namespace std;
#define endl '\n'
#define range(i, a, b) for (int i = a; i < b; i++)
#endif

typedef union {
  struct {
    unsigned int i9 : 1;
    unsigned int i8 : 1;
    unsigned int i7 : 1;
    unsigned int i6 : 1;
    unsigned int i5 : 1;
    unsigned int i4 : 1;
    unsigned int i3 : 1;
    unsigned int i2 : 1;
    unsigned int i1 : 1;
  } tile;
  unsigned int value : 9;
} board;

namespace sudoko {
int winingStates[8] = {
    0b111000000, 0b000111000, 0b000000111, 0b100100100,
    0b010010010, 0b001001001, 0b100010001, 0b001010100,
};
char p1gylph = '*', p2gylph = '#', whitespace = '.';
string welcometext = "Welcome!\n\n";
string movetext = "row column : ";
string invalidmove = "Invalid move.\n";
string p1turn = "Player 1's turn\n";
string p2turn = "Player 2's turn\n";
string p1won = "Player 1 won.\n";
string p2won = "Player 2 won.\n";
string tie = "Tie!\n";

}  // namespace sudoko

bool check(board state) {
  range(i, 0, sizeof(sudoko::winingStates) / sizeof(*sudoko::winingStates)) {
    if ((sudoko::winingStates[i] & state.value) == sudoko::winingStates[i])
      return true;
  }
  return false;
}

bool checkSpace(board overall, board newmove) {
  if ((overall.value & newmove.value) == 0) return true;
  return false;
}

bool takeMove(board* player, board* overall, board move) {
  if (checkSpace(*overall, move)) {
    player->value |= move.value;
    overall->value |= move.value;
    return true;
  }
  return false;
}
void drawBoard(board player1, board player2) {
  range(i, 0, 9) {
    if ((player1.value >> i) & 1)
      cout << sudoko::p1gylph;
    else if ((player2.value >> i) & 1)
      cout << sudoko::p2gylph;
    else
      cout << sudoko::whitespace;
    if (i % 3 == 2) cout << endl;
  }
}

void getMove(board* player, board* overall) {
  bool invalid = false;
  board move;
  do {
  there:
    if (invalid) cout << sudoko::invalidmove;
    cout << sudoko::movetext;
    unsigned short i, j;
    cin >> i >> j;
    if (i < 1 || i > 3 || j < 1 || j > 3) {
      invalid = true;
      goto there;
    }
    move.value = 1 << ((i - 1) * 3 + j - 1);
    invalid = true;
  } while (!takeMove(player, overall, move));
}
void loop() {
  board player1;
  board player2;
  board overall;
  player1.value = 0;
  player2.value = 0;
  overall.value = 0;

  cout << sudoko::welcometext;
  char c;
  // cin >> c;
  int moves = 0;
  // if (c == 'Y' || 'y') {
  while (1) {
    moves++;
    if (moves > 9) {
      cout << sudoko::tie;
      break;
    }
    system("clear");
    system("clear");
    cout << endl << endl;
    drawBoard(player1, player2);
    cout << endl << endl;
    cout << sudoko::p1turn;
    getMove(&player1, &overall);
    cout << endl << endl;
    if (check(player1)) {
      system("clear");
      cout << endl << endl;
      drawBoard(player1, player2);
      cout << endl << endl;
      cout << sudoko::p1won << endl;
      break;
    }

    moves++;
    if (moves > 9) {
      cout << sudoko::tie;
      break;
    }
    system("clear");
    cout << endl << endl;
    drawBoard(player1, player2);
    cout << endl << endl;
    cout << sudoko::p2turn;
    getMove(&player2, &overall);
    if (check(player2)) {
      system("clear");
      cout << endl << endl;
      drawBoard(player1, player2);
      cout << endl << endl;
      cout << sudoko::p2won << endl;
      break;
    }

    cout << endl << endl;
  }
  //}
}
int main() { loop(); }