memcpy with startIndex?

Question

I wish to copy content of specific length from one buffer to another from a specific starting point. I checked memcpy() but it takes only the length of content

Answer 1

Just add the offset you want to the address of the buffer.

char abuff[100], bbuff[100];
....
memcpy( bbuff, abuff + 5, 10 );

This copies 10 bytes starting at abuff[5] to bbuff.