Add skeleton for board class

CMakeLists.txt

@@ -22,4 +22,6 @@ project(skyscraper-puzzle
   HOMEPAGE_URL "https://github.com/dark/skyscraper-puzzle"
   LANGUAGES CXX)
 
-add_executable(skyscraper main.cc)
+add_executable(skyscraper
+  board.cc
+  main.cc)

board.cc

@@ -0,0 +1,35 @@
+/*
+ *  Generate and solve skyscraper puzzles
+ *  Copyright (C) 2024  Marco Leogrande
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "board.h"
+
+#include <cstdlib>
+#include <iostream>
+
+Board::Board(const int size)
+  : size_(size) {
+  if (size <= 0) {
+    std::cerr << "Bad board size: " << size << std::endl;
+    std::abort();
+  }
+
+  board_.resize(size);
+  for (int i = 0; i < size; ++i) {
+    board_[i].resize(size);
+  }
+}

board.h

@@ -0,0 +1,35 @@
+/*
+ *  Generate and solve skyscraper puzzles
+ *  Copyright (C) 2024  Marco Leogrande
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include <vector>
+
+class Board {
+ public:
+  explicit Board(const int size);
+
+ private:
+  const int size_;
+
+  // Each inner vector is a row, and the outer vector selects the row.
+  std::vector<std::vector<int>> board_;
+};
+
+#endif

main.cc

@@ -16,6 +16,9 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+#include "board.h"
+
 int main(void) {
+  Board b{5};
   return 0;
 }