![]() ![]() ![]() | 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; }