This chapter has just enough standard reference information for a working programmer to use on a daily basis. I have left out a lot of the baggage that a full C reference manual would contain; after all, it is largely unnecessary and complex. You should have a thorough understanding of input and output, string handling, memory management, and math and time manipulation as a result.
This is the place to come in the future when you need to look up a part of the code samples that you do not understand fully. The remainder of the book will frequently use, in examples, many of the functions referred to here, and you will find yourself consulting these pages frequently in the future.