extract bytes from certain positions

[dante300981]

Say I want to extract certain amount of bytes from a certain location and copy the bytes back to the current position of a bin file.

eg

a2 has 0C CD D2 C9 CB CC DD DC BC BC CC DD BB BB CB CC

I extract bytes DD DC and copy them back like this

a2 has 0C CD D2 C9 CB CC DD DC BC BC CC DD BB BB CB CC DD DC

I could use an unget loop to go back to get DD DC,but how should move it forward.

Thanks

[Bazzy]

Try with the seekg function
http://www.cplusplus.com/reference/iostream/istream/seekg.html