#/*                 0"!dl"           v                          BEFUNGE CODE */
#ifdef NOT_C /* skip C code for Perl, Ruby and Bash                          */
false && $skipme = <<END ;                          # PERL RUBY AND BASH CODE #
#endif                                                                     /**/
#include <stdio.h>                                                 /* C CODE */
int                                                                /* C CODE */
main (int argc, char **argv)                                       /* C CODE */
{                                                                  /* C CODE */
  printf ("Hello, world!\n");                                      /* C CODE */
  return 0;                                                        /* C CODE */
}                                                                  /* C CODE */
#ifdef NOT_C /*               v"o""r"<                                       */
/*        >                 v >25*25**25*9++ v                  BEFUNGE CODE */
END
# For Perl and Ruby [] means an array/vector, which is true, but for  Bash it #
# means to evaluate the      expression which is false so the command is      #
# skipped. Befunge just uses the comma to     output an ascii character.      #
[ 1 == 2 ] && ( print "Hello, world!\n" );   # PERL,RUBY,BASH AND BEFUNGE CODE#
#For Bash, the arguments to  eval are concatenated and given to the true      #
# command  and so are        ignored, but for Perl and Ruby the 'unless' part #
# is a     separate clause   which causes the whole eval command to be skipped#
eval 'echo "Hello, world!" ; true' unless 1;  # BASH CODE                     #
#endif /* ^                 :#"Hello"    ", "<                  BEFUNGE CODE */
#/*       ^                 _       24*2+,@                     BEFUNGE CODE */
#/*---- Ultimate Programming Challenge: C, Perl, Ruby, Bash and Befunge -----*/