Q: What does C development do?

Q: What does C development do? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. If you have any questions, I would like to ask you. I used to study C in school for some simple management and so on. I used the structure and linked list for simple information management. now I come to work training, the vast majority of time is used to familiarize us with functions, and it takes a lot of time to learn how to process strings, including printing reports (during shell training, we did similar work, it is more convenient for shell to process reports than C )! I'm curious. do new people start from doing this when they enter the company? I have set up a RADIUS server, so I have been watching the APUE and UNP of IRD Steven S. I originally planned to train the company to better learn system programming and network programming, but the fact is a little disappointing to me. I would like to ask you what do C engineers do in development? From the perspective of personal long-term development, should I always follow the company's progress to do character processing and this kind of work takes more time, or should I continue to study the system and network programming at my own pace? I am very confused. I hope you can give me more valuable comments to help me escape the confusion! Thank you!