added a little function to initialise the chip8 structure

Makefile

@@ -3,7 +3,7 @@ ECHO=echo -e
 CFLAGS=-Wall -Werror -std=gnu99 -O0 -g -Iinclude
 LIBS=-lSDL2
 
-FILES=build/main.o build/mem.o build/stack.o build/keyboard.o
+FILES=build/main.o build/mem.o build/stack.o build/keyboard.o build/chip8.o
 OUT=bin/chip8.out
 
 all: $(FILES)
@@ -26,6 +26,10 @@ build/keyboard.o: src/keyboard.c
 	@$(ECHO) "CC\t\t"$<
 	@$(CC) $(CFLAGS) $< -c -o $@ $(LIBS)
 
+build/chip8.o: src/chip8.c
+	@$(ECHO) "CC\t\t"$<
+	@$(CC) $(CFLAGS) $< -c -o $@ $(LIBS)
+
 run: all
 	@$(ECHO) "Runing the Chip8 compiler"
 	@$(OUT)

include/chip8.h

@@ -15,4 +15,6 @@ struct chip8
 	struct chip8_keyboard keyboard;
 };
 
+void chip8_init (struct chip8 *chip8);
+
 #endif

src/chip8.c

@@ -0,0 +1,8 @@
+#include "chip8.h"
+#include <memory.h>
+
+void
+chip8_init (struct chip8 *chip8)
+{
+	memset (chip8, 0, sizeof (struct chip8));
+}

src/main.c

@@ -10,6 +10,7 @@ int
 main (int argc, char **argv)
 {
 	struct chip8 chip8;
+	chip8_init (&chip8);
 
 	SDL_Init (SDL_INIT_EVERYTHING);
 	SDL_Window *window = SDL_CreateWindow (