How do the scanf and fgets functions read?

Question

C++ / C#

How exactly do the scanf and fgets functions read? Do they read the end of the line, space, and so on?

Answer 1

scanf reads the input string byte by byte, constantly comparing against the given pattern and trying to parse. Both spaces and the end of the line are all parsed. One of the largest functions in the standard library.
fgets is generally simple - almost normal while(c != 0) {c = fgetc();}