/* n_11.c:  Operator "defined" in #if or #elif directive.   */

#include    "defs.h"

#define MACRO_abc   abc

#define MACRO_0     0

#define ZERO_TOKEN

main( void)

{

    int     abc = 1, a = 0;

    fputs( "started\n", stderr);

/* 11.1:    */

#if     defined a

    assert( a);

#else

    assert( MACRO_abc);

#endif

#if     defined (MACRO_abc)

    assert( MACRO_abc);

#else

    assert( a);

#endif

/* 11.2:    "defined" is an unary operator whose result is 1 or 0.  */

#if     defined MACRO_0 * 3 != 3

    fputs( "Bad handling of defined operator.\n", stderr);

    exit( 1);

#endif

#if     (!defined ZERO_TOKEN != 0) || (-defined ZERO_TOKEN != -1)

    fputs( "Bad grouping of defined, -, ! in #if expression.\n", stderr);

    exit( 1);

#endif

    fputs( "success\n", stderr);

    return  0;

}