// filename:c2011-6-4-7-ex.c
// original examples and/or notes:
// 		(c) ISO/IEC JTC1 SC22 WG14 N1570, April 12, 2011
// http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf
// 			C2011 6.4.9 Comments
// compile and output mechanism:
// 		(c) Ogawa Kiyoshi, kaizen@gifu-u.ac.jp, December.xx, 2013
// compile errors and/or wornings:
// 1	(c) Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
// 			Target: x86_64-apple-darwin11.4.2 //Thread model: posix
// 		(c) LLVM 2003-2009 University of Illinois at Urbana-Champaign.
// 2    gcc-4.9 (GCC) 4.9.0 20131229 (experimental)
//      Copyright (C) 2013 Free Software Foundation, Inc.
//int main(void){
#define AB	"a//b"		//four-character string literal
#include "//e" 		// undefined behavior

#define glue(x,y) x##y
//** glue(/,/) k(); 		// syntax error, not comment //**
//c2011-6-4-9-ex.c:19:6: error: pasting "/" and "/" does not give a valid preprocessing token
// glue(/,/) k();   // syntax error, not comment
//      ^
// c2011-6-4-9-ex.c:18:19: note: in definition of macro 'glue'
// #define glue(x,y) x##y
//				^
 
int l(void){printf("l() ");};

int main(void){
/*//*/ l(); 		// equivalent to l();
// */ 			// comment, not syntax error
int f,g,h;
f = g/**//h; 		// equivalent tof = g / h;
//\
i(); 			// part of a two-line comment
/\
/ j(); 			// part of a two-line comment
int m,n=1,p=2;
m = n//**/o
+ p; 			// equivalent to m = n + p;

return printf("6.4.9 Comments %d %d %s\n",f,m,AB);
}
// output LLVM 3.2 & GCC4.9
//l() 6.4.9 Comments 0 3 a//b