Add spreadsheet program

Makefile

@@ -0,0 +1,32 @@
+
+CC	   := gcc
+CFLAGS   := -O0 -g -Wall -Wextra -fanalyzer \
+		    -fsanitize=address -fno-omit-frame-pointer
+LDFLAGS  := -g -fsanitize=address
+LDLIBS   := -lncurses
+
+SRC_DIR := src
+OBJ_DIR := obj
+BIN_DIR := bin
+
+EXE := $(BIN_DIR)/run
+SRC := $(wildcard $(SRC_DIR)/*.c)
+OBJ := $(SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
+
+.PHONY: all clean
+
+all: $(EXE)
+
+$(EXE): $(OBJ) | $(BIN_DIR)
+	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@
+
+$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c | $(OBJ_DIR)
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
+
+$(BIN_DIR) $(OBJ_DIR):
+	mkdir -p $@
+
+clean:
+	@$(RM) -rv $(BIN_DIR) $(OBJ_DIR)
+
+-include $(OBJ:.o=.d)