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/* n_15.c: #ifdef, #ifndef directives. */
#include "defs.h"
#define MACRO_0 0
#define MACRO_1 1
main( void)
{
fputs( "started\n", stderr);
/* 15.1: #ifdef directive. */
#ifdef MACRO_1 /* Valid block */
assert( MACRO_1);
#else
assert( MACRO_0);
#endif
/* 15.2: #ifndef directive. */
#ifndef MACRO_1
assert( MACRO_0);
#else /* Valid block */
assert( MACRO_1);
#endif
fputs( "success\n", stderr);
return 0;
}