// filename:c2011-6-4-5-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 6.4.5 String literals
// 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.
#include <stdio.h>
char * s;
int main(void){
printf("\x12" "3");printf("\n");
printf("a" "b" L"c");printf("\n");
printf("%s",s);printf("\n");
printf("a" L"b" "c");printf("\n");
printf(L"a" "b" L"c");printf("\n");
printf(L"a" L"b" L"c");printf("\n");
printf("a" "b" u"c");printf("\n");
printf("a" u"b" "c");printf("\n");
printf(u"a" "b" u"c");printf("\n");
printf(u"a" u"b" u"c");printf("\n");
return printf("6.4.5 String literals \n");
}
// warning and error LLVM3.2
c2011-6-4-5-ex.c:12:8: warning: incompatible pointer types passing 'int [4]' to parameter of type 'const char *'
      [-Wincompatible-pointer-types]
printf("a" "b" L"c");printf("\n");
       ^~~~~~~~~~~~
/usr/include/stdio.h:257:36: note: passing argument to parameter here
int      printf(const char * __restrict, ...) __printflike(1, 2);
                                       ^
c2011-6-4-5-ex.c:12:8: warning: format string should not be a wide string [-Wformat]
printf("a" "b" L"c");printf("\n");
       ^~~~~~~~~~~~
c2011-6-4-5-ex.c:14:8: warning: incompatible pointer types passing 'int [4]' to parameter of type 'const char *'
      [-Wincompatible-pointer-types]
printf("a" L"b" "c");printf("\n");
       ^~~~~~~~~~~~
/usr/include/stdio.h:257:36: note: passing argument to parameter here
int      printf(const char * __restrict, ...) __printflike(1, 2);
                                       ^
c2011-6-4-5-ex.c:14:8: warning: format string should not be a wide string [-Wformat]
printf("a" L"b" "c");printf("\n");
       ^~~~~~~~~~~~
c2011-6-4-5-ex.c:15:8: warning: incompatible pointer types passing 'int [4]' to parameter of type 'const char *'
      [-Wincompatible-pointer-types]
printf(L"a" "b" L"c");printf("\n");
       ^~~~~~~~~~~~~
/usr/include/stdio.h:257:36: note: passing argument to parameter here
int      printf(const char * __restrict, ...) __printflike(1, 2);
                                       ^
c2011-6-4-5-ex.c:15:8: warning: format string should not be a wide string [-Wformat]
printf(L"a" "b" L"c");printf("\n");
       ^~~~~~~~~~~~~
c2011-6-4-5-ex.c:16:8: warning: incompatible pointer types passing 'int [4]' to parameter of type 'const char *'
      [-Wincompatible-pointer-types]
printf(L"a" L"b" L"c");printf("\n");
       ^~~~~~~~~~~~~~
/usr/include/stdio.h:257:36: note: passing argument to parameter here
int      printf(const char * __restrict, ...) __printflike(1, 2);
                                       ^
c2011-6-4-5-ex.c:16:8: warning: format string should not be a wide string [-Wformat]
printf(L"a" L"b" L"c");printf("\n");
       ^~~~~~~~~~~~~~
c2011-6-4-5-ex.c:17:16: error: expected ')'
printf("a" "b" u"c");printf("\n");
               ^
c2011-6-4-5-ex.c:17:7: note: to match this '('
printf("a" "b" u"c");printf("\n");
      ^
c2011-6-4-5-ex.c:18:12: error: expected ')'
printf("a" u"b" "c");printf("\n");
           ^
c2011-6-4-5-ex.c:18:7: note: to match this '('
printf("a" u"b" "c");printf("\n");
      ^
c2011-6-4-5-ex.c:19:8: error: use of undeclared identifier 'u'
printf(u"a" "b" u"c");printf("\n");
       ^
c2011-6-4-5-ex.c:20:8: error: use of undeclared identifier 'u'
printf(u"a" u"b" u"c");printf("\n");
       ^
8 warnings and 4 errors generated.

// Warning GCC4.9
c2011-6-4-5-ex.c: In function 'main':
c2011-6-4-5-ex.c:12:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf("a" "b" L"c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:14:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf("a" L"b" "c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:15:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf(L"a" "b" L"c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:16:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf(L"a" L"b" L"c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:17:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf("a" "b" u"c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'short unsigned int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:18:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf("a" u"b" "c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'short unsigned int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:19:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf(u"a" "b" u"c");printf("\n");
 ^
In file included from c2011-6-4-5-ex.c:8:0:
/usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'short unsigned int *'
 int  printf(const char * __restrict, ...) __printflike(1, 2);
      ^
c2011-6-4-5-ex.c:20:1: warning: passing argument 1 of 'printf' from incompatible pointer type [enabled by default]
 printf(u"a" u"b" u"c");printf("\n");
// ^
//In file included from c2011-6-4-5-ex.c:8:0:
///usr/include/stdio.h:257:6: note: expected 'const char * restrict' but argument is of type 'short unsigned int *'
// int  printf(const char * __restrict, ...) __printflike(1, 2);
//	  ^
// output GCC 4.9
// 3
//a
//(null)
//a
//a
//a
//a
//a
//a
//a
// 6.4.5 String literals