Passing a negative to "%hu" in C

Question

Why does this code print 65535? :

printf( "%hu" ,  ‐1 );

Answer 1

It will print 65535

"%hu" is an unsigned short int which is 16 bit.

-1 is "all-ones", e.g. 0xffff.ffff, but since it gets converted to short it is only 0xffff. Which is 65535 as unsigned.