Convert int to char array (easy but...)

What I want to do exactly is this:

I need to split (in a binary way) an Int into two bytes.
Something like:

int value : 340
same value in binary: 101010100

convert this to 2 bytes:
byte1 = 2 ( 1 in binary );
byte2 = 84 ( 1010100 );

I'm trying to do this but does not work:
byte1 = value>>8;
byte2 = value & 0x00FF;

But gives me wrong values... What I'm doing wrong!?
.