Polyglot

polyglot-1.pl.c

#include <stdio.h>
#define sub void
#define main main()
#define print printf
#define x1 
#if 0
main();
#endif

sub main {
print ("Hello World!"x1);
}

polyglot-2.py.pl.c

#include <stdio.h>

#define sub void
#define main main()
#define print printf
#define x1 

#if 0

qw="""=;

#endif

sub main {
  print ("Hello World!"x1);
}
#if 0
main();
__END__
"""

print "Hello World!"
#endif

polyglot-3.php.py.pl.c

#<?php echo "Hello World!"; __halt_compiler(); ?>
#include <stdio.h>
 
#define sub void
#define main main()
#define print printf
#define x1 
 
#if 0
 
qw="""=;
 
#endif
 
sub main {
  print ("Hello World!"x1);
}
#if 0
main();
__END__
"""
 
print "Hello World!"
#endif

polyglot-4.sh.py.pl.rb.cpp.c

#ifndef __cplusplus
# include <stdio.h>
#else
# include <iostream>
#endif
#if 0
qw='''=; #';
eval 'echo Hello World!;exit; #' if !1;
qw#'''#;
qw='''=;
print "Hello World!\n";
<<s
'
puts "Hello World!"
<<s
'''
print "Hello World!"
"""
#endif
int main() {
#ifndef __cplusplus
puts("Hello World!");
#else
std::cout<<"Hello World!"<<std::endl;
#endif
  return 0;
}
#if 0
s
;
qw#"""#;
#endif

polyglot-5.java.sh.cpp.c

// \u000a /*
#if 0
echo "Hello, Bash!";exit 0;
#endif
#ifdef __cplusplus
#include <iostream>
int main(){std::cout << "Hello, C++!" << std::endl;return 0;}
#else
#include <stdio.h>
int main(){puts("Hello, C!");return 0;}
#endif
#if 0
// \u000a */
public class polyglot{public static void main(String args[]){System.out.println("Hello, Java!");}}
//\u000a /*
#endif
// */