ai.cc

#include <random>
#include <string>
#include <vector>
#include "ai.h"

int FirstOpenAgent(int board[6][7], int ai_player) {
  // To keep the interface for AIs consistent.
  (void)ai_player;

  // Loop over board and find the first place that is not occupied.
  for (int row = 0; row < 5; ++row) {
    for (int col = 0; col < 6; ++col) {
      if (board[row][col] == 0) {
        return col;
      }
    }
  }
  // This can only happen if game is broken.
  throw;
  //return board[6][7];
}

int RandomAgent(int board[6][7], int ai_player) {
  // To keep the interface for AIs consistent.
  (void)ai_player;

  std::vector<int> open_columns;

  // Create list of columns that has an open space
  for (int row = 0; row < 6; ++row) {
    for (int col = 0; col < 7; ++col) {
      if (board[row][col] == 0) {
        open_columns.push_back(col);
      }
    }
  }

  // Randomly select from this list. An empty list implies the board is full.
  // This should not happen.
  //.empty()
  for (size_t choice : open_columns) {
    choice = rand() % open_columns.size();
    srand(choice);
    board[6][7] = {open_columns[choice]};
    // This is working. Ai is choosing from random columns. Feb 15
    return board[6][7];
  }
  /*if (open_columns.empty()) {
    throw; // IT was complaining about this! (Line 49)
  }*/
  return 0;
}

PlayerType GetPlayerType(const std::string &arg) {
  if (arg == "human") {
    return PlayerType::kHuman;
  } else if (arg == "random") {
    return PlayerType::kRandom;
  } else if (arg == "first") {
    return PlayerType::kFirst;
  } else {
    return PlayerType::kInvalid;
  }
}