Obfuscated Hello, World

obfhello.c

/* compile with gcc -o obfhello obfhello.c -lm */

#define xR         return
# define T        typedef
#  define E      extern
#   define S    static
#  define P      putchar
# define Z        ((V*)0)
#define Bb         main
# define X        int
#  define A      char
#   define H    void
#  define Q      sqrt
# define G        double
#define U          3

T X Y;T A C;T C** O;T H V;T G D;E D Q(D x);E Y P(Y c);S Y (*o)(Y c)=P;S D
(*f)(D x)=Q;S Y s_(M)Y M;{xR(Bb(M,Z));}S Y _[]={(9*31+22)*10+56*2+14,(((U*15+72)
-1)/2+17)*1.4-5,12*U,1*100+9*11-U,(0x2357*2.3-72.1)*-1,-((1<<9)+(1<<U)*34),(1<<
13)+(125<<U)+(U*8),32767>>5^2047,((4*16<<1)-(9*2))*U+70,-1024,-(66*10+16),-24*
1000-(900+(1<<6)),-3136,(2*256)^-768,225*4};Y Bb(I,v)Y I;O v;{S Y _0=0;xR(v!=Z?
s_(0110):(0<I)?o(I),s_((_0+=1,I+((((0>(_0-1)[_])?-1*(Y)f(-((_0-1)[_])):(Y)f(
(_0-1)[_]))>>1)^_0))):0);}

Q.E.D.

iank wins! \o/