# Class-based first impressions

Since the elective set election night, only to set up the rest of the class which chose four operations. But when I started designing the course set really no idea, and also with a circular doubly linked list to complete, did not start learning a doubly linked list. So I can only while watching video on the site, while drawing understand learning doubly linked list. After about even understand the basic operation of a two-way table of class-based still do not know how to do. So I ask the teaching assistant, teaching assistant told me some of the problem-solving ideas. I also do not listen operating head dizzy. And I learned of the list is not very good, so he reviewed the way back to the list before. After I began to wonder how to write code. However, as with a number into a four digit to store, and I is not familiar with the operation of the list, really I do not know how to store, so I can only look at the others are doing online. I know about the idea after I started writing code. I first want to use the various functions are written, and then integrate them together. During compilation, there have been numerous errors, especially when writing cycle chain, all kinds of unexpected errors one by one arranged below, but do not know where in the end is not does not know how to change. So only looking for students to help seniors find, in their help, I bite the bullet for these errors one by one modification. List of mistakes is not easy to find, even drew a map is useless. Sometimes a wrong reason to find for a long time but still do not know where the wrong was so frustrated and irritable. There is also a little bit of subtraction does not damage the entire operation is wrong. After several days of efforts, the program finally finished, and works correctly, I was very happy. Complete class-based job let me get a great workout in the C language to learn, so I understand writing code must be rigorous, the class-based job not only exercise I am thinking of the C language learning, but also exercise independent thinking ability to learn multifaceted look at the problem.