Trig or treat!

Here's a litle program I wrote to demonstrate your basic trig functions in C. See if you can guess what the trick is. Paste it into a file called halloween.c To compile it, use any "C" copiler, such as the free gcc:

gcc halloween.c -o halloween -lm

#include <math.h>
main(i,r,c){
for(r=0;r<24;r++){
c=(int)(sinf(acosf(r/12.0-1))*24);
if(r==23)printf("Happy Halloween");else
for(i=0;i<24-c;i++)printf(" ");
for(i=0;i<2*c;i++)printf("%c",
((r>4&&r<8&&(i>6&&i<12||i>26&&i<32))||
(r>12&&r<21&&i>7&&i<2*c-8))?' ':'@');
printf("\n");}}

Copyright (C) 2008 Henry Kroll III, www.thenerdshow.com
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