Data structures and algorithms based on Programming

A few days ago, I did a secondary C ++ test and found some basic knowledge. I used to take two levels of different subjects. I remember that I was just confused and did not understand it. Now I will try again, I found this kind of practice to be thankless and time-consuming. Now I learned how to summarize it. It's just a general summary. I will not write more details, I will not read more, but I will also think less, so I will come up with a general summary. The figure is as follows:

 
AlgorithmService structure