#include <stdio.h>
#include <stdlib.h>
#define MAXLINE 80

int test (unsigned int n) {
/* Replace this with an accurate test. This one is too negative.  */
  return 0;
}

char prompt ( ) {
  printf ("> ");
  return getchar ( );
}

int main ( ) {
  char in[MAXLINE];
  unsigned int n;
  char c;
  int i;
  c = prompt();
  while (c != EOF) {
    i = 0;
    while (c != '\n') {
      in[i++] = c;
      c = getchar();
    }
    in[i] = '\0';
    n = atoi (in);
    if (test (n)) printf ("%u is a power of 2\n", n);
    else printf ("%u is not a power of 2\n", n);
    c = prompt();
  }
}