Tilbage til slide -- Tastaturgenvej: 'u'  forrige -- Tastaturgenvej: 'p'  næste -- Tastaturgenvej: 'n'          structures/books-ptr-1.c - Et eksempel på overførsel og tilbageførsel af bøger via en pointer - virker ikke - forkerte resultater.Lektion 12 - slide 13 : 36
Program 2

/* Incorrect program - compiles, but the program gives wrong results. */

#include <stdio.h>

struct book {
  char *title, *author, *publisher;
  int publishing_year;
  int university_text_book;
};

typedef struct book book;

book *make_book(char *title, char *author, char *publisher, 
               int year, int text_book){
  static book result;
  result.title = title; result.author = author; result.publisher = publisher;
  result.publishing_year = year;
  result.university_text_book = text_book;
 
  return &result;
}

void prnt_book(book *b){
  char *yes_or_no;

  yes_or_no = (b->university_text_book ? "yes" : "no"); 
  printf("Title: %s\n"
         "Author: %s\n"
         "Publisher: %s\n"
         "Year: %4i\n"
         "University text book: %s\n\n",
         b->title, b->author, b->publisher, 
         b->publishing_year, yes_or_no);
}

int main(void) {
  book *b1, *b2;

  b1 = make_book("Problem Solving and Program Design in C", "Hanly & Koffman", 
                 "Pearson", 2010, 1);
  b2 = make_book("Pelle Eroberen", "Martin Andersen Nexoe",
                 "Gyldendal", 1911, 0);

  prnt_book(b1);
  prnt_book(b2);
  
  return 0;
}