Minor code cleanup and added an extra flag to the compiler. If a symbol is a label it will now hold a reference to the opcode and by extension the offset into the file it points to.

src/main.c

@@ -38,7 +38,7 @@ int main(int argc, char* args[]) {
     assemble();
 
     printf("\nBytes:\n");
-    for(int i = 0; i < sizeof(mem); i++) { 
+    for(unsigned long i = 0; i < sizeof(mem); i++) { 
         if (i != 0 && i % 8 == 0) printf("\n");
         printf("%02X ", mem[i] & 0xFF);
     }