[mdaiter]: add CMake file for easier build

Author: mdaiter

CMakeLists.txt

@@ -0,0 +1,27 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+PROJECT(CONNECT4)
+SET(CONNECT4_VERSION_MAJOR 0)
+SET(CONNECT4_VERSION_MINOR 9)
+
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11 -W -Wall -O3 -DNDEBUG")
+
+ADD_LIBRARY(c4solver_dependencies STATIC
+	Solver.cpp
+	Solver.hpp
+	Position.hpp
+	TranspositionTable.hpp
+        OpeningBook.hpp
+	MoveSorter.hpp)
+
+ADD_EXECUTABLE(c4solver
+	main.cpp)
+
+ADD_EXECUTABLE(c4generator
+        generator.cpp)
+
+TARGET_LINK_LIBRARIES(c4solver c4solver_dependencies)
+TARGET_LINK_LIBRARIES(c4generator c4solver_dependencies)
+
+INSTALL(TARGETS c4solver_dependencies DESTINATION lib)
+INSTALL(TARGETS c4generator DESTINATION bin)
+INSTALL(TARGETS c4solver DESTINATION bin)

README.md

@@ -3,3 +3,9 @@
 This C++ source code is published under AGPL v3 license.
 
 Read the associated [step by step tutorial to build a perfect Connect 4 AI](http://blog.gamesolver.org) for explanations.
+
+## Quick build
+```
+mkdir build && cd build
+cmake ../
+```

generator.cpp

@@ -13,17 +13,17 @@ std::unordered_set<uint64_t> visited;
  * Explore and print all possible position under a given depth.
  * symetric positions are printed only once.
  */
-void explore(const Position &P, char* pos_str, const int depth) {
+void explore(const Position &P, char* const pos_str, const int depth) {
   uint64_t key = P.key3();
   if(visited.count(key)) return;  // already explored position
   visited.insert(key);            // flag new position as visited
 
-  int nb_moves = P.nbMoves();
+  const int nb_moves = P.nbMoves();
   if(nb_moves <= depth)
   std::cout << pos_str << std::endl;
   if(nb_moves >= depth) return;  // do not explore at further depth
 
-  for(int i = 0; i < Position::WIDTH; i++) // explore all possible moves
+  for(int i = 0; i < Position::WIDTH; ++i) // explore all possible moves
     if(P.canPlay(i) && !P.isWinningMove(i)) {
       Position P2(P);
       P2.playCol(i);
@@ -71,8 +71,9 @@ void generate_opening_book() {
  */
 int main(int argc, char** argv) {
   if(argc > 1) {
-    int depth = atoi(argv[1]);
-    char pos_str[depth + 1] = {0};
+    const int depth = atoi(argv[1]);
+    char pos_str[depth + 1];
+    memset(pos_str, 0, (depth + 1) * sizeof(int));
     explore(Position(), pos_str, depth);
   } else generate_opening_book();
 }