File processing : file-position pointer

Question

c++ has it that every object of an fstream has a file-position pointer which i don't understand its role and how it works in a file.

Answer 1

thanks @Ace. what you have given cleared the bug

Answer 2

please dont post same post twice...
delet the another one

Answer 3

@sayan you didn't answer the question. worry about my mistake later. your answer wont help me in anyway.