#include <stdio.h>
#include <string.h>

void pr(char*, char*, int);

int main(void) {

  int b1 = strcmp("book", "shelf");    
  int b2 = strcmp("shelf", "book");    
  int b3 = strcmp("","book");
  int b4 = strcmp("book","bookshelf"); 
  int b5 = strcmp("book", "book");
  int b6 = strcmp("7book", "book");
  int b7 = strcmp("BOOK", "book");

  pr("book", "shelf", b1);
  pr("shelf", "book", b2);
  pr("", "book", b3);
  pr("book", "bookshelf", b4);
  pr("book", "book", b5);
  pr("7book","book", b6);
  pr("BOOK", "book", b7);
  
  return 0;
}

void pr(char *s, char *t, int r){
 printf("strcmp(\"%s\",\"%s\") = %i\n", s,t,r);
}