AVR-Chat

I am attempting to move to C (winavr) from bascom for programming but 
getting hung up on some fundamentals.

Given the following

unsigned char byte_in = 0xA;

I need to print the decimal value to UART so I want to see 10.  Similar to 
printf("%d", byte_in).  Lord I hope this makes sense.

Poor planning on your part does not constitute an emergency on my part.