///////    Application of functional argument    ///////
#include <iostream.h>

typedef int (* END_FN)(void *, int);
typedef int (* BOOLEAN_FN) (void *any, int index);

int or_test(void *any, BOOLEAN_FN test, END_FN is_end)
{ int len=0;
      while ( ! is_end(any,len) )
      {    if ( test(any, len) ) return(1);
           len++;
      }
      return(0);
}
int even(int *ip, int j)
{  return( (ip[j] & 01)  == 0 );}

int odd(int *ip, int j)
{  return( (ip[j] & 01)  == 1 );}

int int_end(int *a, int i)
{       return( a[i] == -1 );
}

int str_end(char *a, int i)
{       return( a[i] == '\0' );
}

int main()
{  int b[]={4,2,8,3,-1};
   int c[]={3,7,1,10,-1};
   int i = or_test(b, BOOLEAN_FN(even), END_FN(int_end));
   cout << "or_test = " << i << endl;
   i = or_test(c, BOOLEAN_FN(odd), END_FN(int_end));
   cout << "or_test = " << i << endl;
   return(0);
}