/* header files */
#include <stdio.h>
#include <stdlib.h>
#include <math.h> /* main */
int main( void )
{ char s[] = " sno ";
char empty[] = "";
if ( isnan(nan(s)) )
{
}
if ( isnan(nan(empty)) )
{
printf(" nan(empty): NaN\n "); }
if ( isnan(nan( NULL )) )
{
}
return EXIT_SUCCESS ;
}
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