/* primer15.c - funkcija isalpha * u <ctype.h> kao
 *               makro-definicija preko bitova;
 *               Prototip: int isalpha( int c );
 *               Povratna vrednost: != 0 ako je tacno, inace 0
 **************************************************************/
#include <stdio.h>

int isalpha (int c );

main()
{
   char c;
   int k;

   while( (c = getchar()) != EOF )
       {
            k = isalpha( c );
            printf("%c k = %d\n", c, k );
       }
}
int isalpha( int c )
{
   int k;

   k = 0;
   if( ((65 <= c) && ( c <= 90 ))
       || (97 <= c) && ( c <= 122 )) k = 1;
   return k;
}