7 files changed, 79 insertions, 10 deletions
diff --git a/.gitignore b/.gitignore
index 4f457ba..3e5e27a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
-ai
+aimc
+airand
 .objs/
diff --git a/Makefile b/Makefile
index c8bca05..c1a3ee7 100644
--- a/Makefile
+++ b/Makefile
@@ -2,20 +2,36 @@ CXX := g++
 CXXFLAGS := -Wall -Wextra -std=c++11 -g -O2
 LDFLAGS :=
 
-TARGET := ai
 OBJDIR := .objs
 
-CXX_SOURCES := $(wildcard *.cpp)
-OBJ_FILES := $(patsubst %.cpp,$(OBJDIR)/%.o,$(CXX_SOURCES))
-DEP_FILES := $(patsubst %.cpp,$(OBJDIR)/%.d,$(CXX_SOURCES))
+ifneq ($(value AI),)
+	AI_UPPER := $(shell echo '$(value AI)' | tr a-z A-Z)
+	AI_LOWER := $(shell echo '$(value AI)' | tr A-Z a-z)
+else
+	AI_UPPER := MC
+	AI_LOWER := mc
+endif
 
+CXXFLAGS += -DAI=$(AI_UPPER)
 
-.PHONY: all clean
+MAIN_OBJ := $(OBJDIR)/main_$(AI_LOWER).o
+CXX_SOURCES := $(filter-out main.cpp ai_%.cpp,$(wildcard *.cpp)) ai_$(AI_LOWER).cpp
+OBJ_FILES := $(patsubst %.cpp,$(OBJDIR)/%.o,$(CXX_SOURCES)) $(MAIN_OBJ)
+DEP_FILES := $(patsubst %.cpp,$(OBJDIR)/%.d,$(CXX_SOURCES)) $(MAIN_OBJ:.o=.d)
+
+TARGET := ai$(AI_LOWER)
+
+AI_ALL_LOWER := $(patsubst ai_%.cpp,%,$(wildcard ai_*.cpp))
+
+TARGET_ALL := $(patsubst %,ai%,$(AI_ALL_LOWER))
+
+
+.PHONY: all clean debug
 
 all: $(TARGET)
 
 clean:
-	rm -f $(TARGET)
+	rm -f $(TARGET_ALL)
 	rm -rf $(OBJDIR)
 
 $(TARGET): $(OBJ_FILES) termio/libtermio.a
@@ -32,6 +48,16 @@ $(OBJDIR)/%.d: %.cpp termio/libtermio.a
 	@echo DEP $<
 	@$(CXX) -MT $(OBJDIR)/$*.o -MM $(CXXFLAGS) $< >$@
 
+$(OBJDIR)/main_$(AI_LOWER).o: main.cpp termio/libtermio.a
+	@mkdir -p $(dir $@)
+	@echo CXX "$< -o $(notdir $@)"
+	@$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+$(OBJDIR)/main_$(AI_LOWER).d: main.cpp termio/libtermio.a
+	@mkdir -p $(dir $@)
+	@echo DEP "$< -o $(notdir $@)"
+	@$(CXX) -MT $(OBJDIR)/$*.o -MM $(CXXFLAGS) $< >$@
+
 termio/.git:
 	git submodule update --init
 
diff --git a/mc.cpp b/ai_mc.cpp
index 5e64102..6175d96 100644
--- a/mc.cpp
+++ b/ai_mc.cpp
@@ -1,7 +1,7 @@
 #include <iostream>
 #include <cassert>
 #include <climits>
-#include "mc.h"
+#include "ai_mc.h"
 #include "util.h"
 
 using namespace std;
diff --git a/mc.h b/ai_mc.h
index d4221d9..d4221d9 100644
--- a/mc.h
+++ b/ai_mc.h
diff --git a/ai_rand.cpp b/ai_rand.cpp
new file mode 100644
index 0000000..7479d01
--- /dev/null
+++ b/ai_rand.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+#include <cassert>
+#include <climits>
+#include "ai_rand.h"
+#include "util.h"
+
+using namespace std;
+
+
+int RAND::calcMove(Board &bd, uint8_t myclr) {
+	(void)myclr;
+	assert(bd.bag.totalLeft() > 0);
+
+	int moves[BSZ * BSZ], nmoves = 0;
+	bd.forEachMove([&moves, &nmoves](int idx) { moves[nmoves++] = idx; });
+
+	assert(nmoves > 0);
+	return moves[random() % nmoves];
+}
diff --git a/ai_rand.h b/ai_rand.h
new file mode 100644
index 0000000..9185ccd
--- /dev/null
+++ b/ai_rand.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include "board.h"
+
+using namespace std;
+
+
+namespace RAND {
+	// bd will be unchanged upon return
+	int calcMove(Board &bd, uint8_t myclr);
+}
diff --git a/main.cpp b/main.cpp
index c53f5ae..61cd573 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,18 +2,28 @@
 #include <cstdlib>
 #include <sys/time.h>
 #include "board.h"
-#include "mc.h"
+#include "ai_mc.h"
+#include "ai_rand.h"
 #include "ui.h"
 #include "util.h"
 
 using namespace std;
 
+#define STR_(x) #x
+#define STR(x) STR_(x)
+
+#ifndef AI
+#define AI MC
+#endif
+
 
 int main() {
 	struct timeval tv;
 	gettimeofday(&tv, nullptr);
 	srandom(tv.tv_sec * 1000000U + tv.tv_usec);
 
+	cerr << "Using AI " << STR(AI) << endl;
+
 	Board bd = Board::makeEmpty();
 	cerr << "Initial stone at " << Idx(BSZ * BMID + BMID) << endl;
 	bd.put(BSZ * BMID + BMID, bd.bag.drawRandom());
@@ -30,7 +40,7 @@ int main() {
 			cout << "YOUR TURN." << endl;
 			idx = UI::getMove(bd);
 		} else {
-			idx = MC::calcMove(bd, onturn);
+			idx = AI::calcMove(bd, onturn);
 		}
 
 		uint8_t clr = bd.bag.drawRandom();
@@ -45,4 +55,6 @@ int main() {
 
 		onturn = NEXTTURN(onturn);
 	}
+
+	cout << "TIE" << endl;
 }