what's the difference between `fseek`, `lseek`, `seekg`, `seekp`?

Question

I was asked by an interviewer that how would I implement tail (yes, the one in linux shell). My answer was, first seek to the end of the file, then read charact

Answer 1

Use seekg when using the C++ IOstreams library. seekp is no use here, since it sets the put pointer.

Use fseek when using the C stdio library. Use lseek when using low-level POSIX file descriptor I/O.

The difference between the various seek functions is just the kind of file/stream objects on which they operate. On Linux, seekg and fseek are probably implemented in terms of lseek.