A program that is ruby and C at the same time. Weird!

hello.rb.c

#ifndef false /*

#
# Written on Nov 2, 2012 by @mntmn
#
# This program is both ruby and C. Try it out:
#
# gcc hello.rb.c -o hello
# ./hello
#
# ruby hello.rb.c
#

def if_ruby
  yield
end
def if_c
end
def main
  yield
end
def void(f)
end
#*/
#endif

#include <stdio.h>
#define puts(X) printf(X);
#define if_ruby if(0)
#define if_c if(1)

void main() {
  puts("Hello world.\n")
  if_ruby {
    puts("This is ruby.\n")
  }
  if_c {
    puts("This is C.\n")
  }
}

😃