Problems with fstream, one variabile for write and read

I use a fstream variabile to open a file in write and read mode.

Code:

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fstream file;
file.open("filepath", ios::in | ios::out | ios:: binary);

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What's the difference between using seekg or seekp?
There's really two different pointers or there's only one?

Why if i read things, write things then move the pointer to the beginning to overwrite data (using for example file.seekp(0)) it writes the data to the end of the file?

I used seekg and seekp either for moving read and write pointers (if there's really two), i also tried to use only seekg.. ah and everytime i write something, before reading or moving the pointer, i flush the fstream.

seekg sets the position of the "get" pointer (where things will be read from); seekp sets the position of the "put" pointer (where things will be written to).

You'll have to be a little more specific about what you tried to do and how it didn't work, I feel.

oh damn i hate myself a lot now xD
So stupid mistake, i forgot that i close the handle to let another handle open the file and then when i reopen the old handle i use the append mode -.- .

>> There's really two different pointers or there's only one?
Only one for files (or basic_filebuf to be specific).

gg