这个是YACC和LEX结合使用来实现整数加法的简单事例，我体现的是基本的步骤，不在于其功能的完美和强大，给我一样的菜鸟以启示，以便您不必在开始的路上徘徊太久，希望您喜欢-the LEX and YACC is a combination of integers to achieve a simple example, I embody the basic steps, not its function in a perfect and strong, give me the same exposure to enlightenment, so that you need not start wandering on the road for too long, I hope you like