How do I flatten the following C function by eliminating the while statement?

void bytecopy$($char dest$[],$ char src$[],$ int count$)\{$

count $=$ count $-1$;

while$($count$>=0)\{$

dest$[$count$]=$ scr$[$count$]$;

count $=$ count $-1$;

$\}$

$\}$