1道C语言难题，HELP!!

a 011 b 101 c 111 JH(a,b):a=011^101=110 b=110^101=011 a=110^011=101 a 101 b 011 c 111 JH(b,c):b=011^111=100 c=100^111=011 b=100^011=111 a 101 b 111 c 011 JH(a,c):a=101^011=110 c=110^011=101 a=110^101=011 a=3 b=7 c=5