// filename:c2011-7-6-1-ex.c
// original examples and/or notes:
// 		(c) ISO/IEC JTC1 SC22 WG14 N1570, April 12, 2011
// 			C2011 7.6.1 The FENV_ACCESS pragma
// compile and output mechanism:
// 		(c) Ogawa Kiyoshi, kaizen@gifu-u.ac.jp, December.29, 2013
// compile errors and/or wornings:
// 		(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.
#include <stdio.h>
		
// Example
#include <fenv.h>
void f(double x)
{
#pragma STDC FENV_ACCESS ON
void g(double);
void h(double);
/* ... */
g(x + 1);
h(x + 1);
/* ... */
}

void g(double d){
	d=d*d;
	printf("%f\n",d);
}
void h(double d){
	d=d*d*d;
	printf("%f\n",d);
}
int main(void)
{
f(0.5);
return printf("7.6.1 The FENV_ACCESS pragma\n");
}
// warning may be 
// c2011-7-6-1-ex.c:17:14: warning: pragma STDC FENV_ACCESS ON is not supported, ignoring pragma [-Wunknown-pragmas]
//#pragma STDC FENV_ACCESS ON
//             ^
//1 warning generated.
// output may be
//2.250000
//3.375000
// 7.6.1 The FENV_ACCESS pragma